diff --git a/nw/assets/themes/gui/default/style.qss b/nw/assets/themes/gui/default/style.qss
deleted file mode 100644
index 14e81208..00000000
--- a/nw/assets/themes/gui/default/style.qss
+++ /dev/null
@@ -1,3 +0,0 @@
-/**
- * Default Theme: Light
- */
diff --git a/nw/assets/themes/gui/default_dark/README.md b/nw/assets/themes/gui/default_dark/README.md
deleted file mode 100644
index 36d11bcf..00000000
--- a/nw/assets/themes/gui/default_dark/README.md
+++ /dev/null
@@ -1,8 +0,0 @@
-# Default Dark Theme
-
-## Icons
-
-The following icons are from the typicons.font package on [GitHub](https://github.com/stephenhutchings/typicons.font):
-
-* globe.svg
-* time.svg
diff --git a/nw/assets/themes/gui/default_dark/icons/add.png b/nw/assets/themes/gui/default_dark/icons/add.png
deleted file mode 100644
index 48632071..00000000
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diff --git a/nw/assets/themes/gui/default_dark/icons/close.png b/nw/assets/themes/gui/default_dark/icons/close.png
deleted file mode 100644
index e3ff6ae0..00000000
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diff --git a/nw/assets/themes/gui/default_dark/icons/document.png b/nw/assets/themes/gui/default_dark/icons/document.png
deleted file mode 100644
index 0d619034..00000000
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diff --git a/nw/assets/themes/gui/default_dark/icons/folder.png b/nw/assets/themes/gui/default_dark/icons/folder.png
deleted file mode 100644
index e7e36709..00000000
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diff --git a/nw/assets/themes/gui/default_dark/icons/globe.svg b/nw/assets/themes/gui/default_dark/icons/globe.svg
deleted file mode 100644
index d56050b5..00000000
--- a/nw/assets/themes/gui/default_dark/icons/globe.svg
+++ /dev/null
@@ -1,56 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://creativecommons.org/ns#"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   version="1.2"
-   width="20"
-   height="20"
-   viewBox="0 0 20 20"
-   id="svg856"
-   sodipodi:docname="globe.svg"
-   inkscape:version="0.92.4 (5da689c313, 2019-01-14)">
-  <metadata
-     id="metadata862">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-        <dc:title></dc:title>
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <defs
-     id="defs860" />
-  <sodipodi:namedview
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1"
-     objecttolerance="10"
-     gridtolerance="10"
-     guidetolerance="10"
-     inkscape:pageopacity="0"
-     inkscape:pageshadow="2"
-     inkscape:window-width="1920"
-     inkscape:window-height="1013"
-     id="namedview858"
-     showgrid="false"
-     inkscape:zoom="33.875"
-     inkscape:cx="12.118081"
-     inkscape:cy="12"
-     inkscape:window-x="1920"
-     inkscape:window-y="27"
-     inkscape:window-maximized="1"
-     inkscape:current-layer="svg856" />
-  <path
-     d="m 8.932347,3.9995001 c 2.198072,0 3.985624,1.794056 3.985624,4.0001249 0,2.206069 -1.787552,4.000125 -3.985624,4.000125 -2.1960777,0 -3.9836298,-1.794056 -3.9836298,-4.000125 0,-2.2060689 1.7875521,-4.0001249 3.9836298,-4.0001249 m 0,-2.0000625 c -3.3020882,0 -5.9764414,2.6860839 -5.9764414,6.0001874 0,3.314104 2.6743532,6.000188 5.9764414,6.000188 3.300097,0 5.978436,-2.688084 5.978436,-6.000188 0,-3.3141035 -2.678339,-6.0001874 -5.978436,-6.0001874 z m 5.978436,16.0005004 h -3.985624 v -1.230039 c 1.635102,-0.371012 3.134693,-1.188037 4.347319,-2.406075 C 16.965371,12.664771 17.9,10.4037 17.9,8.000625 17.9,5.9335605 17.211483,3.9724992 15.939073,2.3814495 l 0.672574,-0.673021 c 0.389595,-0.3910122 0.389595,-1.023032 9.75e-4,-1.4150442 -0.390591,-0.3920123 -1.020319,-0.3900122 -1.409914,-0.001 l -2.044625,2.049064 0.705456,0.7080221 c 1.317248,1.3210413 2.043628,3.0800966 2.043628,4.9501546 0,1.870058 -0.72638,3.627113 -2.043628,4.949155 -1.317249,1.322041 -3.067934,2.051064 -4.931213,2.051064 -1.8632787,0 -3.6139637,-0.729023 -4.9312122,-2.051064 -0.3895946,-0.391013 -1.0193231,-0.391013 -1.4089178,0 -0.3895947,0.390012 -0.3895947,1.023032 0,1.414044 1.6928935,1.699053 3.9447707,2.637082 6.34013,2.637082 v 1.000032 H 4.9467244 c -0.5510125,0 -0.9964058,0.447013 -0.9964058,1.000031 C 3.9503186,19.552986 4.3957119,20 4.9467244,20 h 9.9640586 c 0.551012,0 0.996406,-0.447014 0.996406,-1.000031 0,-0.553018 -0.445394,-1.000031 -0.996406,-1.000031 z"
-     id="path854"
-     inkscape:connector-curvature="0"
-     style="stroke-width:0.99821687;fill:#aeaeae;fill-opacity:1" />
-</svg>
diff --git a/nw/assets/themes/gui/default_dark/icons/orphan.png b/nw/assets/themes/gui/default_dark/icons/orphan.png
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index 1d2c1b26..00000000
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diff --git a/nw/assets/themes/gui/default_dark/icons/remove.png b/nw/assets/themes/gui/default_dark/icons/remove.png
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index 0b218f87..00000000
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diff --git a/nw/assets/themes/gui/default_dark/icons/replace.png b/nw/assets/themes/gui/default_dark/icons/replace.png
deleted file mode 100644
index 55155d97..00000000
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diff --git a/nw/assets/themes/gui/default_dark/icons/root.png b/nw/assets/themes/gui/default_dark/icons/root.png
deleted file mode 100644
index a927c6d1..00000000
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diff --git a/nw/assets/themes/gui/default_dark/icons/save.png b/nw/assets/themes/gui/default_dark/icons/save.png
deleted file mode 100644
index 6b3c4496..00000000
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diff --git a/nw/assets/themes/gui/default_dark/icons/search.png b/nw/assets/themes/gui/default_dark/icons/search.png
deleted file mode 100644
index 8cdb5347..00000000
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diff --git a/nw/assets/themes/gui/default_dark/icons/time.svg b/nw/assets/themes/gui/default_dark/icons/time.svg
deleted file mode 100644
index bdb740c1..00000000
--- a/nw/assets/themes/gui/default_dark/icons/time.svg
+++ /dev/null
@@ -1,61 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://creativecommons.org/ns#"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
-   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
-   version="1.2"
-   width="21"
-   height="21"
-   viewBox="0 0 21 21"
-   id="svg1039"
-   sodipodi:docname="time-dark.svg"
-   inkscape:version="0.92.4 (5da689c313, 2019-01-14)">
-  <metadata
-     id="metadata1045">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-        <dc:title></dc:title>
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <defs
-     id="defs1043" />
-  <sodipodi:namedview
-     pagecolor="#ffffff"
-     bordercolor="#666666"
-     borderopacity="1"
-     objecttolerance="10"
-     gridtolerance="10"
-     guidetolerance="10"
-     inkscape:pageopacity="0"
-     inkscape:pageshadow="2"
-     inkscape:window-width="1920"
-     inkscape:window-height="1013"
-     id="namedview1041"
-     showgrid="false"
-     inkscape:zoom="27.812867"
-     inkscape:cx="6.903687"
-     inkscape:cy="11.89962"
-     inkscape:window-x="1920"
-     inkscape:window-y="27"
-     inkscape:window-maximized="1"
-     inkscape:current-layer="svg1039" />
-  <g
-     id="g1037"
-     transform="translate(-1.5,-2)"
-     style="fill:#aeaeae;fill-opacity:1">
-    <path
-       d="M 19.414,8.902 C 19.518,8.854 19.62,8.794 19.707,8.707 l 0.5,-0.5 c 0.391,-0.391 0.391,-1.023 0,-1.414 -0.391,-0.391 -1.023,-0.391 -1.414,0 l -0.5,0.5 -0.115,0.173 C 16.791,6.154 14.99,5.276 12.989,5.056 L 13,5 V 4 h 1 C 14.55,4 15,3.55 15,3 15,2.45 14.55,2 14,2 H 10 C 9.45,2 9,2.45 9,3 9,3.55 9.45,4 10,4 h 1 v 1 l 0.012,0.057 C 6.506,5.549 3,9.364 3,14 c 0,4.971 4.029,9 9,9 4.971,0 9,-4.029 9,-9 0,-1.894 -0.588,-3.648 -1.586,-5.098 z M 12,21 C 8.141,21 5,17.86 5,14 5,10.14 8.141,7 12,7 c 3.859,0 7,3.14 7,7 0,3.86 -3.141,7 -7,7 z m 1,-8 v -2 c 0,-0.55 -0.45,-1 -1,-1 -0.55,0 -1,0.45 -1,1 v 3 c 0,0.55 0.45,1 1,1 h 3 c 0.55,0 1,-0.45 1,-1 0,-0.55 -0.45,-1 -1,-1 z M 12,8 c -3.312,0 -6,2.688 -6,6 0,3.312 2.688,6 6,6 3.312,0 6,-2.688 6,-6 0,-3.312 -2.688,-6 -6,-6 z m 0,11 C 9.243,19 7,16.757 7,14 7,11.243 9.243,9 12,9 c 2.757,0 5,2.243 5,5 0,2.757 -2.243,5 -5,5 z"
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-</svg>
diff --git a/nw/assets/themes/gui/default_dark/icons/trash.png b/nw/assets/themes/gui/default_dark/icons/trash.png
deleted file mode 100644
index 96afbba0..00000000
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diff --git a/nw/assets/themes/gui/default_dark/styles.qss b/nw/assets/themes/gui/default_dark/styles.qss
index 4b647f09..44f94ec6 100644
--- a/nw/assets/themes/gui/default_dark/styles.qss
+++ b/nw/assets/themes/gui/default_dark/styles.qss
@@ -1,3 +1,5 @@
 /**
  * Default Theme: Dark
+ * This theme doesn't use any custom styles, so the file is only here as
+ * an example. There doesn't have to be a styles.qss file in the folder.
  */