Unity crashes after i exit playmode and the play button becomes blue

![alt text][1] Unity crashes after i exit playmode (press the play button while the game is playing) and the play button becomes blue. The game is not playing (i am not in playmode). I can not do anything in the editor and i can not resize the window. The only way to close unity is to restart the computer. [1]: /storage/temp/99238-unity-froze.png