What is that? All I can see is blank dark screen
I found a small guide from here which supposedly should work
Quoting the post:
I recently discovered that Unity makes Flash crash, and that you can make Flash restart. Here’s how
1) Go to the webpage of the Unity application. It should say that Shockwave Flash has crashed.
2) Click “Stop Plugin”
Now, you may be thinking I’ve gone insane. Keep reading
3) If you have a Flash-containing site open, there should be a picture of a puzzle piece with a face like “X_X” where the Flash was. Reload the page