Rhino won't launch, instant error screen

Rhino won’t launch any model from my computer. One day it worked and the next it didn’t. I am not sure what the problem. I only get send error report when trying to launch it.

It sounds like you’re trying to start Rhino through File Association by clicking on a 3dm file.

Does Rhino start if you use the desktop shortcut?
Is this V5, V6, Windows or Mac?