10.4 has an update to Bookmarks and Navigator.   It creates C:\Program Files (x86)\Common Files\ParnassusShared and places
ParnassusBookmarks_XSydney.dll
ParnassusCoreEditor_XSydney.dll
ParnassusNavigator_XSydney.dll   So, to cure the 10.3 ailments, copy from C:\Users\<username>\Documents\Embarcadero\Studio\20.0\CatalogRepository\ to the first mentioned common catalog Bookmarks-1.0\ParnassusBookmarks.dll to ParnassusBookmarks_XRio.dll
ParnassusCoreEditor-1.0\ParnassusCoreEditor.dll to ParnassusCoreEditor_XRio.dll
Navigator-1.0\ParnassusNavigator.dll to ParnassusNavigator_XRio.dll
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