diff --git a/novelwriter/__init__.py b/novelwriter/__init__.py
index 55e73ce9..68a049f4 100644
--- a/novelwriter/__init__.py
+++ b/novelwriter/__init__.py
@@ -27,7 +27,6 @@ import sys
 import getopt
 import logging
 
-from PyQt5.QtGui import QIcon
 from PyQt5.QtWidgets import QApplication, QErrorMessage
 
 from novelwriter.error import exceptionHandler, logException
@@ -249,7 +248,6 @@ def main(sysArgs=None):
         nwApp = QApplication([CONFIG.appName, (f"-style={qtStyle}")])
         nwApp.setApplicationName(CONFIG.appName)
         nwApp.setApplicationVersion(__version__)
-        nwApp.setWindowIcon(QIcon(CONFIG.appIcon))
         nwApp.setOrganizationDomain(__domain__)
 
         # Connect the exception handler before making the main GUI
diff --git a/novelwriter/config.py b/novelwriter/config.py
index 17b99530..ef342f4d 100644
--- a/novelwriter/config.py
+++ b/novelwriter/config.py
@@ -51,6 +51,9 @@ class Config:
 
     def __init__(self):
 
+        # Initialisation
+        # ==============
+
         # Set Application Variables
         self.appName   = "novelWriter"
         self.appHandle = "novelwriter"
@@ -62,20 +65,37 @@ class Config:
         self._confPath = confRoot.absolute() / self.appHandle  # The user config location
         self._dataPath = dataRoot.absolute() / self.appHandle  # The user data location
 
-        self.cmdOpen   = None  # Path from command line for project to be opened on launch
-        self.lastPath  = None  # The last user-selected folder (browse dialogs)
-        self.appPath   = None  # The full path to the novelwriter package folder
-        self.appRoot   = None  # The full path to the novelwriter root folder
-        self.appIcon   = None  # The full path to the novelwriter icon file
-        self.assetPath = None  # The full path to the novelwriter/assets folder
-        self.pdfDocs   = None  # The location of the PDF manual, if it exists
+        if hasattr(sys, "_MEIPASS"):
+            self._appPath = Path(sys._MEIPASS).absolute()
+        else:
+            self._appPath = Path(__file__).parent.absolute()
+
+        self._appRoot = self._appPath.parent
+        if self._appRoot.is_file():
+            # novelWriter is packaged as a single file
+            self._appRoot = self._appRoot.parent
+            self._appPath = self._appRoot
+
+        self.cmdOpen  = None  # Path from command line for project to be opened on launch
+        self.lastPath = None  # The last user-selected folder (browse dialogs)
+        self.pdfDocs  = None  # The location of the PDF manual, if it exists
 
         # Runtime Settings and Variables
         self.hasError = False     # True if the config class encountered an error
         self.errData  = []        # List of error messages
         self.confChanged = False  # True whenever the config has chenged, false after save
 
-        # General
+        # Localisation Info
+        self._qLocal     = QLocale.system()
+        self._qtTrans    = {}
+        self._qtLangPath = QLibraryInfo.location(QLibraryInfo.TranslationsPath)
+        self._nwLangPath = str(self._appPath / "assets" / "i18n")
+
+        # User Settings
+        # =============
+
+        # General GUI Settings
+        self.guiLang     = self._qLocal.name()
         self.guiTheme    = ""     # GUI theme
         self.guiSyntax   = ""     # Syntax theme
         self.guiFont     = ""     # Defaults to system default font
@@ -86,14 +106,7 @@ class Config:
         self.setDefaultGuiTheme()
         self.setDefaultSyntaxTheme()
 
-        # Localisation
-        self.qLocal     = QLocale.system()
-        self.guiLang    = self.qLocal.name()
-        self.qtLangPath = QLibraryInfo.location(QLibraryInfo.TranslationsPath)
-        self.nwLangPath = None
-        self.qtTrans    = {}
-
-        # Sizes
+        # Size Settings
         self.winGeometry  = [1200, 650]
         self.prefGeometry = [700, 615]
         self.projColWidth = [200, 60, 140]
@@ -103,16 +116,16 @@ class Config:
         self.outlnPanePos = [500, 150]
         self.isFullScreen = False
 
-        # Features
+        # Feature Settings
         self.hideVScroll = False  # Hide vertical scroll bars on main widgets
         self.hideHScroll = False  # Hide horizontal scroll bars on main widgets
         self.emphLabels  = True   # Add emphasis to H1 and H2 item labels
 
-        # Project
+        # Project Settings
         self.autoSaveProj = 60  # Interval for auto-saving project in seconds
         self.autoSaveDoc  = 30  # Interval for auto-saving document in seconds
 
-        # Text Editor
+        # Text Editor Settings
         self.textFont        = None   # Editor font
         self.textSize        = 12     # Editor font size
         self.textWidth       = 700    # Editor text width
@@ -151,7 +164,7 @@ class Config:
         self.stopWhenIdle    = True   # Stop the status bar clock when the user is idle
         self.userIdleTime    = 300    # Time of inactivity to consider user idle
 
-        # User-Selected Symbols
+        # User-Selected Symbol Settings
         self.fmtApostrophe   = nwUnicode.U_RSQUO
         self.fmtSingleQuotes = [nwUnicode.U_LSQUO, nwUnicode.U_RSQUO]
         self.fmtDoubleQuotes = [nwUnicode.U_LDQUO, nwUnicode.U_RDQUO]
@@ -159,7 +172,7 @@ class Config:
         self.fmtPadAfter     = ""
         self.fmtPadThin      = False
 
-        # Spell Checking
+        # Spell Checking Settings
         self.spellLanguage = None
 
         # Search Bar Switches
@@ -170,7 +183,7 @@ class Config:
         self.searchNextFile = False
         self.searchMatchCap = False
 
-        # Backup
+        # Backup Settings
         self.backupPath      = ""
         self.backupOnClose   = False
         self.askBeforeBackup = True
@@ -180,6 +193,9 @@ class Config:
         self.viewComments = True  # Comments are shown in the viewer
         self.viewSynopsis = True  # Synopsis is shown in the viewer
 
+        # System and App Information
+        # ==========================
+
         # Check Qt5 Versions
         verQt = splitVersionNumber(QT_VERSION_STR)
         self.verQtString = QT_VERSION_STR
@@ -254,6 +270,13 @@ class Config:
             return self._dataPath / target
         return self._dataPath
 
+    def getAssetPath(self, target=None):
+        """Return a path in the assets folder.
+        """
+        if isinstance(target, str):
+            return self._appPath / "assets" / target
+        return self._appPath / "assets"
+
     ##
     #  Config Actions
     ##
@@ -271,29 +294,12 @@ class Config:
             logger.info("Setting data path from alternative path: %s", dataPath)
             self._dataPath = Path(dataPath)
 
-        logger.debug("Config path: %s", self._confPath)
-        logger.debug("Data path: %s", self._dataPath)
+        logger.debug("Config Path: %s", self._confPath)
+        logger.debug("Data Path: %s", self._dataPath)
+        logger.debug("App Root: %s", self._appRoot)
+        logger.debug("App Path: %s", self._appPath)
 
         self.lastPath = os.path.expanduser("~")
-        self.appPath = getattr(sys, "_MEIPASS", os.path.abspath(os.path.dirname(__file__)))
-        self.appRoot = os.path.abspath(os.path.join(self.appPath, os.path.pardir))
-
-        if os.path.isfile(self.appRoot):
-            # novelWriter is packaged as a single file, so the app and
-            # root paths are the same, and equal to the folder that
-            # contains the single executable.
-            self.appRoot = os.path.dirname(self.appRoot)
-            self.appPath = self.appRoot
-
-        # Assets
-        self.assetPath = os.path.join(self.appPath, "assets")
-        self.appIcon   = os.path.join(self.assetPath, "icons", "novelwriter.svg")
-
-        # Internationalisation
-        self.nwLangPath = os.path.join(self.assetPath, "i18n")
-
-        logger.debug("Assets: %s", self.assetPath)
-        logger.debug("App path: %s", self.appPath)
         logger.debug("Last path: %s", self.lastPath)
 
         # If the config and data folders don't not exist, create them
@@ -324,9 +330,9 @@ class Config:
             self.spellLanguage = "en"
 
         # Look for a PDF version of the manual
-        pdfDocs = os.path.join(self.assetPath, "manual.pdf")
-        if os.path.isfile(pdfDocs):
-            logger.debug("Found manual: %s", pdfDocs)
+        pdfDocs = self._appPath / "assets" / "manual.pdf"
+        if pdfDocs.is_file():
+            logger.debug("Found PDF manual: %s", pdfDocs)
             self.pdfDocs = pdfDocs
 
         logger.debug("Config initialisation complete")
@@ -336,24 +342,24 @@ class Config:
     def initLocalisation(self, nwApp):
         """Initialise the localisation of the GUI.
         """
-        self.qLocal = QLocale(self.guiLang)
-        QLocale.setDefault(self.qLocal)
-        self.qtTrans = {}
+        self._qLocal = QLocale(self.guiLang)
+        QLocale.setDefault(self._qLocal)
+        self._qtTrans = {}
 
         langList = [
-            (self.qtLangPath, "qtbase"),  # Qt 5.x
-            (self.nwLangPath, "qtbase"),  # Alternative Qt 5.x
-            (self.nwLangPath, "nw"),      # novelWriter
+            (self._qtLangPath, "qtbase"),  # Qt 5.x
+            (self._nwLangPath, "qtbase"),  # Alternative Qt 5.x
+            (self._nwLangPath, "nw"),      # novelWriter
         ]
         for lngPath, lngBase in langList:
-            for lngCode in self.qLocal.uiLanguages():
+            for lngCode in self._qLocal.uiLanguages():
                 qTrans = QTranslator()
                 lngFile = "%s_%s" % (lngBase, lngCode.replace("-", "_"))
-                if lngFile not in self.qtTrans:
+                if lngFile not in self._qtTrans:
                     if qTrans.load(lngFile, lngPath):
                         logger.debug("Loaded: %s", os.path.join(lngPath, lngFile))
                         nwApp.installTranslator(qTrans)
-                        self.qtTrans[lngFile] = qTrans
+                        self._qtTrans[lngFile] = qTrans
 
         return
 
@@ -372,8 +378,8 @@ class Config:
         else:
             return []
 
-        for qmFile in os.listdir(self.nwLangPath):
-            if not os.path.isfile(os.path.join(self.nwLangPath, qmFile)):
+        for qmFile in os.listdir(self._nwLangPath):
+            if not os.path.isfile(os.path.join(self._nwLangPath, qmFile)):
                 continue
             if not qmFile.startswith(fPre) or not qmFile.endswith(fExt):
                 continue
diff --git a/novelwriter/core/coretools.py b/novelwriter/core/coretools.py
index 4f9d4954..97bab0de 100644
--- a/novelwriter/core/coretools.py
+++ b/novelwriter/core/coretools.py
@@ -24,7 +24,6 @@ You should have received a copy of the GNU General Public License
 along with this program. If not, see <https://www.gnu.org/licenses/>.
 """
 
-import os
 import shutil
 import logging
 import novelwriter
@@ -431,8 +430,8 @@ class ProjectBuilder:
             logger.error("No project path set for the example project")
             return False
 
-        pkgSample = os.path.join(self.mainConf.assetPath, "sample.zip")
-        if os.path.isfile(pkgSample):
+        pkgSample = self.mainConf.getAssetPath("sample.zip")
+        if pkgSample.is_file():
             try:
                 shutil.unpack_archive(pkgSample, projPath)
             except Exception as exc:
diff --git a/novelwriter/core/project.py b/novelwriter/core/project.py
index a0e3ac8d..49df331a 100644
--- a/novelwriter/core/project.py
+++ b/novelwriter/core/project.py
@@ -698,13 +698,13 @@ class NWProject(QObject):
     def _loadProjectLocalisation(self):
         """Load the language data for the current project language.
         """
-        if self._data.language is None or self.mainConf.nwLangPath is None:
+        if self._data.language is None or self.mainConf._nwLangPath is None:
             self._langData = {}
             return False
 
-        langFile = Path(self.mainConf.nwLangPath) / f"project_{self._data.language}.json"
+        langFile = Path(self.mainConf._nwLangPath) / f"project_{self._data.language}.json"
         if not langFile.is_file():
-            langFile = Path(self.mainConf.nwLangPath) / "project_en_GB.json"
+            langFile = Path(self.mainConf._nwLangPath) / "project_en_GB.json"
 
         try:
             with open(langFile, mode="r", encoding="utf-8") as inFile:
diff --git a/novelwriter/dialogs/about.py b/novelwriter/dialogs/about.py
index 5b3a509e..8d4523b1 100644
--- a/novelwriter/dialogs/about.py
+++ b/novelwriter/dialogs/about.py
@@ -23,7 +23,6 @@ You should have received a copy of the GNU General Public License
 along with this program. If not, see <https://www.gnu.org/licenses/>.
 """
 
-import os
 import logging
 import novelwriter
 
@@ -233,7 +232,7 @@ class GuiAbout(QDialog):
     def _fillNotesPage(self):
         """Load the content for the Release Notes page.
         """
-        docPath = os.path.join(self.mainConf.assetPath, "text", "release_notes.htm")
+        docPath = self.mainConf.getAssetPath("text") / "release_notes.htm"
         docText = readTextFile(docPath)
         if docText:
             self.pageNotes.setHtml(docText)
@@ -244,7 +243,7 @@ class GuiAbout(QDialog):
     def _fillLicensePage(self):
         """Load the content for the Licence page.
         """
-        docPath = os.path.join(self.mainConf.assetPath, "text", "gplv3_en.htm")
+        docPath = self.mainConf.getAssetPath("text") / "gplv3_en.htm"
         docText = readTextFile(docPath)
         if docText:
             self.pageLicense.setHtml(docText)
diff --git a/novelwriter/gui/mainmenu.py b/novelwriter/gui/mainmenu.py
index a3b7eca0..b4acd6f2 100644
--- a/novelwriter/gui/mainmenu.py
+++ b/novelwriter/gui/mainmenu.py
@@ -26,6 +26,7 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
 import logging
 import novelwriter
 
+from pathlib import Path
 from urllib.parse import urljoin
 from urllib.request import pathname2url
 
@@ -104,10 +105,11 @@ class GuiMainMenu(QMenuBar):
     def _openUserManualFile(self):
         """Open the documentation in PDF format.
         """
-        if self.mainConf.pdfDocs is None:
-            return False
-        QDesktopServices.openUrl(QUrl(urljoin("file:", pathname2url(self.mainConf.pdfDocs))))
-        return True
+        if isinstance(self.mainConf.pdfDocs, Path):
+            QDesktopServices.openUrl(
+                QUrl(urljoin("file:", pathname2url(str(self.mainConf.pdfDocs))))
+            )
+        return
 
     ##
     #  Menu Builders
@@ -881,7 +883,7 @@ class GuiMainMenu(QMenuBar):
         self.helpMenu.addAction(self.aHelpDocs)
 
         # Help > User Manual (PDF)
-        if self.mainConf.pdfDocs is not None:
+        if isinstance(self.mainConf.pdfDocs, Path):
             self.aPdfDocs = QAction(self.tr("User Manual (PDF)"), self)
             self.aPdfDocs.setShortcut("Shift+F1")
             self.aPdfDocs.triggered.connect(self._openUserManualFile)
diff --git a/novelwriter/gui/theme.py b/novelwriter/gui/theme.py
index fc8a7f49..061c8b5c 100644
--- a/novelwriter/gui/theme.py
+++ b/novelwriter/gui/theme.py
@@ -24,12 +24,10 @@ You should have received a copy of the GNU General Public License
 along with this program. If not, see <https://www.gnu.org/licenses/>.
 """
 
-import os
 import logging
 import novelwriter
 
 from math import ceil
-from pathlib import Path
 
 from PyQt5.QtCore import Qt
 from PyQt5.QtWidgets import qApp
@@ -120,9 +118,8 @@ class GuiTheme:
         self._availThemes = {}
         self._availSyntax = {}
 
-        self._listConf(self._availSyntax, os.path.join(self.mainConf.assetPath, "syntax"))
-        self._listConf(self._availThemes, os.path.join(self.mainConf.assetPath, "themes"))
-
+        self._listConf(self._availSyntax, self.mainConf.getAssetPath("syntax"))
+        self._listConf(self._availThemes, self.mainConf.getAssetPath("themes"))
         self._listConf(self._availSyntax, self.mainConf.getDataPath("syntax"))
         self._listConf(self._availThemes, self.mainConf.getDataPath("themes"))
 
@@ -380,7 +377,6 @@ class GuiTheme:
     def _listConf(self, targetDict, checkDir):
         """Scan for theme config files and populate the dictionary.
         """
-        checkDir = Path(checkDir)
         if not checkDir.is_dir():
             return False
 
@@ -476,7 +472,7 @@ class GuiIcons:
         self._confName  = "icons.conf"
 
         # Icon Theme Path
-        self._iconPath = os.path.join(self.mainConf.assetPath, "icons")
+        self._iconPath = self.mainConf.getAssetPath("icons")
 
         # Icon Theme Meta
         self.themeName        = ""
@@ -499,12 +495,12 @@ class GuiIcons:
         update functions for the classes where they're used.
         """
         self._themeMap = {}
-        themePath = os.path.join(self.mainConf.assetPath, "icons", iconTheme)
-        if not os.path.isdir(themePath):
+        themePath = self._iconPath / iconTheme
+        if not themePath.is_dir():
             logger.warning("No icons loaded for '%s'", iconTheme)
             return False
 
-        themeConf = os.path.join(themePath, self._confName)
+        themeConf = themePath / self._confName
         logger.info("Loading icon theme '%s'", iconTheme)
 
         # Config File
@@ -535,8 +531,8 @@ class GuiIcons:
                 if iconName not in self.ICON_KEYS:
                     logger.error("Unknown icon name '%s' in config file", iconName)
                 else:
-                    iconPath = os.path.join(themePath, iconFile)
-                    if os.path.isfile(iconPath):
+                    iconPath = themePath / iconFile
+                    if iconPath.is_file():
                         self._themeMap[iconName] = iconPath
                         logger.debug("Icon slot '%s' using file '%s'", iconName, iconFile)
                     else:
@@ -572,18 +568,16 @@ class GuiIcons:
         if decoKey in self._themeMap:
             imgPath = self._themeMap[decoKey]
         elif decoKey in self.IMAGE_MAP:
-            imgPath = os.path.join(
-                self.mainConf.assetPath, "images", self.IMAGE_MAP[decoKey]
-            )
+            imgPath = self.mainConf.getAssetPath("images") / self.IMAGE_MAP[decoKey]
         else:
             logger.error("Decoration with name '%s' does not exist", decoKey)
             return QPixmap()
 
-        if not os.path.isfile(imgPath):
+        if not imgPath.is_file():
             logger.error("Asset not found: %s", imgPath)
             return QPixmap()
 
-        theDeco = QPixmap(imgPath)
+        theDeco = QPixmap(str(imgPath))
         if pxW is not None and pxH is not None:
             return theDeco.scaled(pxW, pxH, Qt.IgnoreAspectRatio, Qt.SmoothTransformation)
         elif pxW is None and pxH is not None:
@@ -667,15 +661,14 @@ class GuiIcons:
 
         # If we just want the app icons, return right away
         if iconKey == "novelwriter":
-            return QIcon(os.path.join(self._iconPath, "novelwriter.svg"))
+            return QIcon(str(self._iconPath / "novelwriter.svg"))
         elif iconKey == "proj_nwx":
-            return QIcon(os.path.join(self._iconPath, "x-novelwriter-project.svg"))
+            return QIcon(str(self._iconPath / "x-novelwriter-project.svg"))
 
         # Otherwise, we load from the theme folder
         if iconKey in self._themeMap:
-            relPath = os.path.relpath(self._themeMap[iconKey], self._iconPath)
-            logger.debug("Loading: %s", relPath)
-            return QIcon(self._themeMap[iconKey])
+            logger.debug("Loading: %s", self._themeMap[iconKey].name)
+            return QIcon(str(self._themeMap[iconKey]))
 
         # If we didn't find one, give up and return an empty icon
         logger.warning("Did not load an icon for '%s'", iconKey)
diff --git a/novelwriter/guimain.py b/novelwriter/guimain.py
index 98471d8d..ae918d9a 100644
--- a/novelwriter/guimain.py
+++ b/novelwriter/guimain.py
@@ -29,6 +29,7 @@ import novelwriter
 
 from enum import Enum
 from time import time
+from pathlib import Path
 from datetime import datetime
 
 from PyQt5.QtCore import Qt, QTimer, QThreadPool, pyqtSlot
@@ -95,7 +96,11 @@ class GuiMain(QMainWindow):
         # Prepare Main Window
         self.resize(*self.mainConf.getWinSize())
         self._updateWindowTitle()
-        self.setWindowIcon(QIcon(self.mainConf.appIcon))
+
+        nwIcon = self.mainConf.getAssetPath("icons") / "novelwriter.svg"
+        self.nwIcon = QIcon(str(nwIcon)) if nwIcon.is_file() else QIcon()
+        self.setWindowIcon(self.nwIcon)
+        qApp.setWindowIcon(self.nwIcon)
 
         # Build the GUI
         # =============
@@ -1362,7 +1367,7 @@ class GuiMain(QMainWindow):
 
         # Help
         self.addAction(self.mainMenu.aHelpDocs)
-        if self.mainConf.pdfDocs is not None:
+        if isinstance(self.mainConf.pdfDocs, Path):
             self.addAction(self.mainMenu.aPdfDocs)
 
         return True
diff --git a/novelwriter/tools/lipsum.py b/novelwriter/tools/lipsum.py
index 976732dd..002f7769 100644
--- a/novelwriter/tools/lipsum.py
+++ b/novelwriter/tools/lipsum.py
@@ -23,7 +23,6 @@ You should have received a copy of the GNU General Public License
 along with this program. If not, see <https://www.gnu.org/licenses/>.
 """
 
-import os
 import random
 import logging
 import novelwriter
@@ -120,7 +119,7 @@ class GuiLipsum(QDialog):
     def _doInsert(self):
         """Load the text and insert it in the open document.
         """
-        lipsumFile = os.path.join(self.mainConf.assetPath, "text", "lipsum.txt")
+        lipsumFile = self.mainConf.getAssetPath("text") / "lipsum.txt"
         lipsumText = readTextFile(lipsumFile).splitlines()
 
         if self.randSwitch.isChecked():
diff --git a/tests/test_base/test_base_config.py b/tests/test_base/test_base_config.py
index 42aa9b14..c0f5fe79 100644
--- a/tests/test_base/test_base_config.py
+++ b/tests/test_base/test_base_config.py
@@ -159,14 +159,14 @@ def testBaseConfig_Init(monkeypatch, tmpDir, fncDir, outDir, refDir, filesDir):
         tstConf.initConfig(confPath=tmpDir, dataPath=tmpDir)
         assert tstConf._confPath == tmpDir
         assert tstConf._dataPath == tmpDir
-        appRoot = tstConf.appRoot
+        appRoot = tstConf._appRoot
 
         mp.setattr("os.path.isfile", lambda *a: True)
         tstConf.initConfig(confPath=tmpDir, dataPath=tmpDir)
         assert tstConf._confPath == tmpDir
         assert tstConf._dataPath == tmpDir
-        assert tstConf.appRoot == os.path.dirname(appRoot)
-        assert tstConf.appPath == os.path.dirname(appRoot)
+        assert tstConf._appRoot == os.path.dirname(appRoot)
+        assert tstConf._appPath == os.path.dirname(appRoot)
 
     assert tstConf.loadConfig() is True
     assert tstConf.saveConfig() is True
@@ -199,7 +199,7 @@ def testBaseConfig_Init(monkeypatch, tmpDir, fncDir, outDir, refDir, filesDir):
     i18nDir = os.path.join(fncDir, "i18n")
     os.mkdir(i18nDir)
     os.mkdir(os.path.join(i18nDir, "stuff"))
-    tstConf.nwLangPath = i18nDir
+    tstConf._nwLangPath = i18nDir
 
     copyfile(os.path.join(filesDir, "nw_en_GB.qm"), os.path.join(i18nDir, "nw_en_GB.qm"))
     writeFile(os.path.join(i18nDir, "nw_en_GB.ts"), "")
diff --git a/tests/test_core/test_core_coretools.py b/tests/test_core/test_core_coretools.py
index 4fc6c9ec..5398e4f7 100644
--- a/tests/test_core/test_core_coretools.py
+++ b/tests/test_core/test_core_coretools.py
@@ -372,7 +372,7 @@ def testCoreTools_NewCustomB(monkeypatch, fncDir, outDir, refDir, mockGUI, mockR
 
 
 @pytest.mark.core
-def testCoreTools_NewSample(fncDir, tmpConf, mockGUI, tmpDir):
+def testCoreTools_NewSample(monkeypatch, fncPath, tmpConf, tmpPath, mockGUI):
     """Check that we can create a new project can be created from the
     provided sample project via a zip file.
     """
@@ -380,7 +380,7 @@ def testCoreTools_NewSample(fncDir, tmpConf, mockGUI, tmpDir):
         "projName": "Test Sample",
         "projTitle": "Test Novel",
         "projAuthors": "Jane Doe\nJohn Doh\n",
-        "projPath": fncDir,
+        "projPath": fncPath,
         "popSample": True,
         "popMinimal": False,
         "popCustom": False,
@@ -392,9 +392,11 @@ def testCoreTools_NewSample(fncDir, tmpConf, mockGUI, tmpDir):
     assert projBuild.buildProject({"popSample": True}) is False
 
     # Force the lookup path for assets to our temp folder
-    srcSample = os.path.abspath(os.path.join(tmpConf.appRoot, "sample"))
-    dstSample = os.path.join(tmpDir, "sample.zip")
-    tmpConf.assetPath = tmpDir
+    srcSample = tmpConf._appRoot / "sample"
+    dstSample = tmpPath / "sample.zip"
+    monkeypatch.setattr(
+        "novelwriter.config.Config.getAssetPath", lambda *a: tmpPath / "sample.zip"
+    )
 
     # Cannot extract when the zip does not exist
     assert projBuild.buildProject(projData) is False
diff --git a/tests/test_dialogs/test_dlg_about.py b/tests/test_dialogs/test_dlg_about.py
index 63de9039..b4357051 100644
--- a/tests/test_dialogs/test_dlg_about.py
+++ b/tests/test_dialogs/test_dlg_about.py
@@ -21,6 +21,8 @@ along with this program. If not, see <https://www.gnu.org/licenses/>.
 
 import pytest
 
+from pathlib import Path
+
 from tools import getGuiItem
 
 from PyQt5.QtWidgets import QAction, QMessageBox
@@ -29,7 +31,7 @@ from novelwriter.dialogs.about import GuiAbout
 
 
 @pytest.mark.gui
-def testDlgAbout_NWDialog(qtbot, nwGUI):
+def testDlgAbout_NWDialog(qtbot, monkeypatch, nwGUI):
     """Test the novelWriter about dialogs.
     """
     # NW About
@@ -45,13 +47,12 @@ def testDlgAbout_NWDialog(qtbot, nwGUI):
     assert msgAbout.pageNotes.document().characterCount() > 100
     assert msgAbout.pageLicense.document().characterCount() > 100
 
-    msgAbout.mainConf.assetPath = "whatever"
-
-    msgAbout._fillNotesPage()
-    assert msgAbout.pageNotes.toPlainText() == "Error loading release notes text ..."
-
-    msgAbout._fillLicensePage()
-    assert msgAbout.pageLicense.toPlainText() == "Error loading licence text ..."
+    with monkeypatch.context() as mp:
+        mp.setattr("novelwriter.config.Config.getAssetPath", lambda *a: Path("whatever"))
+        msgAbout._fillNotesPage()
+        assert msgAbout.pageNotes.toPlainText() == "Error loading release notes text ..."
+        msgAbout._fillLicensePage()
+        assert msgAbout.pageLicense.toPlainText() == "Error loading licence text ..."
 
     msgAbout.showReleaseNotes()
     assert msgAbout.tabBox.currentWidget() == msgAbout.pageNotes
diff --git a/tests/test_gui/test_gui_theme.py b/tests/test_gui/test_gui_theme.py
index cd16ff86..df0a1b15 100644
--- a/tests/test_gui/test_gui_theme.py
+++ b/tests/test_gui/test_gui_theme.py
@@ -19,10 +19,10 @@ You should have received a copy of the GNU General Public License
 along with this program. If not, see <https://www.gnu.org/licenses/>.
 """
 
-import os
 import shutil
 import pytest
 
+from pathlib import Path
 from configparser import ConfigParser
 
 from mock import causeOSError
@@ -38,7 +38,7 @@ from novelwriter.gui.theme import GuiIcons, GuiTheme
 
 
 @pytest.mark.gui
-def testGuiTheme_Main(qtbot, nwGUI, fncDir):
+def testGuiTheme_Main(qtbot, nwGUI, fncPath):
     """Test the theme class init.
     """
     mainTheme: GuiTheme = nwGUI.mainTheme
@@ -75,15 +75,15 @@ def testGuiTheme_Main(qtbot, nwGUI, fncDir):
     # Scan for Themes
     # ===============
 
-    assert mainTheme._listConf({}, "not_a_path") is False
+    assert mainTheme._listConf({}, Path("not_a_path")) is False
 
-    themeOne = os.path.join(fncDir, "themes", "themeone.conf")
-    themeTwo = os.path.join(fncDir, "themes", "themetwo.conf")
+    themeOne = fncPath / "themes" / "themeone.conf"
+    themeTwo = fncPath / "themes" / "themetwo.conf"
     writeFile(themeOne, "# Stuff")
     writeFile(themeTwo, "# Stuff")
 
     result = {}
-    assert mainTheme._listConf(result, os.path.join(fncDir, "themes")) is True
+    assert mainTheme._listConf(result, fncPath / "themes") is True
     assert result["themeone"] == themeOne
     assert result["themetwo"] == themeTwo
 
@@ -123,7 +123,7 @@ def testGuiTheme_Main(qtbot, nwGUI, fncDir):
 
 
 @pytest.mark.gui
-def testGuiTheme_Theme(qtbot, monkeypatch, nwGUI, fncDir):
+def testGuiTheme_Theme(qtbot, monkeypatch, nwGUI, fncPath):
     """Test the theme part of the class.
     """
     mainTheme: GuiTheme = nwGUI.mainTheme
@@ -132,15 +132,8 @@ def testGuiTheme_Theme(qtbot, monkeypatch, nwGUI, fncDir):
     # List Themes
     # ===========
 
-    shutil.copy(
-        os.path.join(mainConf.assetPath, "themes", "default_dark.conf"),
-        os.path.join(fncDir, "themes")
-    )
-    shutil.copy(
-        os.path.join(mainConf.assetPath, "themes", "default.conf"),
-        os.path.join(fncDir, "themes")
-    )
-    writeFile(os.path.join(fncDir, "themes", "default.qss"), "/* Stuff */")
+    shutil.copy(mainConf.getAssetPath("themes") / "default_dark.conf", fncPath / "themes")
+    shutil.copy(mainConf.getAssetPath("themes") / "default.conf", fncPath / "themes")
 
     # Block the reading of the files
     with monkeypatch.context() as mp:
@@ -197,7 +190,7 @@ def testGuiTheme_Theme(qtbot, monkeypatch, nwGUI, fncDir):
 
 
 @pytest.mark.gui
-def testGuiTheme_Syntax(qtbot, monkeypatch, nwGUI, fncDir):
+def testGuiTheme_Syntax(qtbot, monkeypatch, nwGUI, fncPath):
     """Test the syntax part of the class.
     """
     mainTheme: GuiTheme = nwGUI.mainTheme
@@ -206,14 +199,8 @@ def testGuiTheme_Syntax(qtbot, monkeypatch, nwGUI, fncDir):
     # List Themes
     # ===========
 
-    shutil.copy(
-        os.path.join(mainConf.assetPath, "syntax", "default_dark.conf"),
-        os.path.join(fncDir, "syntax")
-    )
-    shutil.copy(
-        os.path.join(mainConf.assetPath, "syntax", "default_light.conf"),
-        os.path.join(fncDir, "syntax")
-    )
+    shutil.copy(mainConf.getAssetPath("syntax") / "default_dark.conf", fncPath / "syntax")
+    shutil.copy(mainConf.getAssetPath("syntax") / "default_light.conf", fncPath / "syntax")
 
     # Block the reading of the files
     with monkeypatch.context() as mp:
@@ -270,11 +257,10 @@ def testGuiTheme_Syntax(qtbot, monkeypatch, nwGUI, fncDir):
 
 
 @pytest.mark.gui
-def testGuiTheme_Icons(qtbot, caplog, monkeypatch, nwGUI, fncDir):
+def testGuiTheme_Icons(qtbot, caplog, monkeypatch, nwGUI, fncPath):
     """Test the icon cache class.
     """
     iconCache: GuiIcons = nwGUI.mainTheme.iconCache
-    mainConf: Config = nwGUI.mainConf
 
     # Load Theme
     # ==========
@@ -288,10 +274,11 @@ def testGuiTheme_Icons(qtbot, caplog, monkeypatch, nwGUI, fncDir):
         assert iconCache.loadTheme("typicons_dark") is False
 
     # Load a broken theme file
-    iconsDir = os.path.join(fncDir, "icons")
-    os.mkdir(iconsDir)
-    os.mkdir(os.path.join(iconsDir, "testicons"))
-    writeFile(os.path.join(iconsDir, "testicons", "icons.conf"), (
+    iconsDir = fncPath / "icons"
+    testIcons = iconsDir / "testicons"
+    iconsDir.mkdir()
+    testIcons.mkdir()
+    writeFile(testIcons / "icons.conf", (
         "[Main]\n"
         "name = Test Icons\n"
         "\n"
@@ -300,15 +287,15 @@ def testGuiTheme_Icons(qtbot, caplog, monkeypatch, nwGUI, fncDir):
         "stuff = stuff.svg\n"
     ))
 
-    assetPath = mainConf.assetPath
-    mainConf.assetPath = fncDir
+    iconPath = iconCache._iconPath
+    iconCache._iconPath = fncPath / "icons"
 
     caplog.clear()
     assert iconCache.loadTheme("testicons") is True
     assert "Unknown icon name 'stuff' in config file" in caplog.text
     assert "Icon file 'add.svg' not in theme folder" in caplog.text
 
-    mainConf.assetPath = assetPath
+    iconCache._iconPath = iconPath
 
     # Load working theme file
     assert iconCache.loadTheme("typicons_dark") is True
@@ -327,7 +314,7 @@ def testGuiTheme_Icons(qtbot, caplog, monkeypatch, nwGUI, fncDir):
 
     # Fail finding the file
     with monkeypatch.context() as mp:
-        mp.setattr("os.path.isfile", lambda *a: False)
+        mp.setattr("pathlib.Path.is_file", lambda *a: False)
         qPix = iconCache.loadDecoration("wiz-back")
         assert qPix.isNull() is True