After a lot testing I think I have solved the problem: - I have downgraded to 3.3.2 build 30416 (latest stable version) - Options > Preferences > Advanced > UI > Delete all Labels . Save . Then restart application, add labels again and and reapply them. (ok, it is painful but it did work) For some reason, %AppData%/uTorrent has again some files (although the same files exist sto same directory of utorrent).