I updated from JabRef 4.0 to 4.3.1 (I deleted the old version beforehand). In the process, I updated my Java to 181. I did this yesterday on two different computers, both running Windows 8 (x64).
I now have the problem that when I add new entries to the .bib-file I am working on, and save it, the “last modified”-date does not change in file explorer. When I try to compile my LaTeX-document with the bibliography, the entries that were added since the update are not included.
When I open the bib-file using TeXworks and search for the new entries, they are not there.
However, when I close JabRef and then open it again by clicking on the bib-file, the newly added entries are again perfectly listed in the list of entries in JabRef’s UI. So, everything new is saved somewhere, but seemingly not in the bib-file where it belongs.