Workaround: change the line "app.runtime=$ROOTDIR\runtime" to "app.runtime=$APPDIR\runtime" in JabRef.cfg file in the app folder. I've reported this bug to the jpackage devs.
Workaround: change the line "app.runtime=$ROOTDIR\runtime" to "app.runtime=$APPDIR\runtime" in JabRef.cfg file in the app folder.
I've reported this bug to the jpackage devs.