I updated Unity to 5.5.0f3. Yesterday everything was great, but today I cant open folders and scenes in Project window (only with right click - open). When I click on object in Hierarchy window - editor camera didn’t go to it in scene window. Restart, closing and reopen scene window did’t help.
UPD: some times, after restart all works fine for 1-1.5f min, then this bug.
OMG Thanks for the tip. Instant replay was on and I was having this problem. Using Unity 5.5.0f3 64bit GTX970m laptop GPU and double clicking on scenes in the project window did not open that scene instead it opens the rename mode. I tried everything and was thinking of reinstalling whole unity. After reading this I disabled instant replay and the problem is solved instantly