That fork is KeePassX [1]. And it's cross-platform too!
Support for the KeePass2 format was the only thing preventing me from using it in the past.
(At the very least, a .kdbx on Syncthing/Droxbox-like storage WILL eventually lead to data loss.)
It's been working for me without issue since 2009-ish. I've used 1.x and 2.x databases in Dropbox.
It's a small pain to go through and figure out which item is out of sync, but doable.