I've installed JabRef version 2.9.2 (before 2.6) on a 64 Bit windows 7 system. In the past I've never had any problems with synchronization of file links. But now nothing happens when I select tools-> legacy tools-> synchronize PDF links or PS links. The file directory settings are correct in all preferences (see attachments). When I click within an entry under general-> file-> Auto then the file is linked. But I want to synchronize 450 files so that is no option.
I've no idea anymore what could be wrong. Thanks for any help here.