JabRef version 5.0-dev on Windows 10

• I have tested the latest development version from http://builds.jabref.org/master/ and the problem persists

When loading an existing bibliography, the Entry Preview end Entry Editor panes only work after opening the Preferences and clicking "Save". (I don't even need to change any settings - just opening the dialog is enough.) This happens every time a new bibliography is opened, ie. even without restarting the program in the meantime.

Steps to reproduce the behavior:

1. Create a new bibliography and add an entry
2. Save and close bibliography
3. Reopen
4. Entry Editor fails to show on double-click on the entry
5. Open Options -> Preferences
6. Hit "Save"
7. Entry Editor now opens on double click

The Event Log only shows "Can only load style files: Preview"