I was playing through the tutorial (just to check all features of the beta, helping out) and had the tutorial pop-up for the hiring a hero appear twice. This then lead to to the video playing with another pop-up asking to play over the top and after closing the video only a black screen and the mouse were left on screen. The program continued to run though nothing could be done in game (the hotkeys also stopped working so the menu couldn't be accessed). I had to exit the program to close it.

I tried this again and got the same result. There was no crash file as the program didn't actually crash, it just ceased to work, expect for the mouse which was fine (good design work on that).