I'm on Windows 10 Enterprise version 1607.
Yes, the program freezes when adding the video to the timeline. I can open the movie and see a small preview of it in the top left pane, but when I drag it down to the timeline, the cursor turns to the busy circle, and the program freezes. I have to force it to close using the Task Manager.
No luck with the latest beta. In fact, now videos that were working before have stopped working. Instead of causing the program to freeze when adding them to the timeline, they actually crash the program, and the Windows dialog comes up saying that the software has stopped working.