Hi! I've switched back from the current release (1.4.93) to 1.4.82 (Windows) and 1.4.72 (Linux). Until now, the bug seems gone (at least for the file that I had the problem with). Don't know if other files are (still) troubled. Also I don't know if reinstalling the new version would have done the same for me. However, it leaves a very, very bad taste to know that there might be a bug like that around that potentially destroys all your work. Even though BTSync is still in beta, people will start using it for productive environments since "beta" sadly became a label that can be found everywhere nowadays. A label that has no true meaning anymore! This can also be seen when looking at BTSyncs version numbers: The app claims to be still in "beta", but dot-releases are coming in rapid succession without a stable version in between (or did I miss something?). Cheers, MCB