The isExported option should only apply to files

sample/sampleNovel/nwProject.nwx

@@ -1,5 +1,5 @@
 <?xml version='1.0' encoding='utf-8'?>
-<novelWriterXML appVersion="0.5" fileVersion="1.0" saveCount="257" autoCount="31" timeStamp="2020-05-10 22:50:38">
+<novelWriterXML appVersion="0.5" fileVersion="1.0" saveCount="263" autoCount="31" timeStamp="2020-05-10 23:14:34">
   <project>
     <name>Sample Project</name>
     <title>Sample Project</title>
@@ -51,7 +51,6 @@
       <class>NOVEL</class>
       <status>Started</status>
       <expanded>True</expanded>
-      <exported>True</exported>
     </item>
     <item handle="53b69b83cdafc" order="0" parent="7031beac91f75">
       <name>Title Page</name>
@@ -72,7 +71,6 @@
       <class>NOVEL</class>
       <status>1st Draft</status>
       <expanded>True</expanded>
-      <exported>True</exported>
     </item>
     <item handle="6a2d6d5f4f401" order="0" parent="e7ded148d6e4a">
       <name>Chapter One</name>
@@ -171,7 +169,6 @@
       <class>CHARACTER</class>
       <status>None</status>
       <expanded>True</expanded>
-      <exported>True</exported>
     </item>
     <item handle="f7e2d9f330615" order="0" parent="f6622b4617424">
       <name>Main Characters</name>
@@ -179,7 +176,6 @@
       <class>CHARACTER</class>
       <status>None</status>
       <expanded>True</expanded>
-      <exported>True</exported>
     </item>
     <item handle="14298de4d9524" order="0" parent="f7e2d9f330615">
       <name>John Smith</name>
@@ -213,7 +209,6 @@
       <class>WORLD</class>
       <status>None</status>
       <expanded>True</expanded>
-      <exported>True</exported>
     </item>
     <item handle="b3e74dbc1f584" order="0" parent="15c4492bd5107">
       <name>Earth</name>
@@ -260,7 +255,6 @@
       <class>TRASH</class>
       <status>None</status>
       <expanded>True</expanded>
-      <exported>True</exported>
     </item>
     <item handle="b8136a5a774a0" order="0" parent="98acd8c76c93a">
       <name>Delete Me!</name>