Hmm, odd, its a very light installation with only HTPC-related programs. No photoshop or similar. In windowed mode the ctrl+j apparantly searches for updates as Jim pointed out, I don't know if it should behave differently in exclusive mode though. I guess I'll just wait for the new version.
On another note, I have an idea for a feature: How about a shortcut that shows the picture with a simple uscaling on half the picture, and the advanced madVR-upscaling you have chosen in your prefs on the other half, to see the effects of the settings? Its more of a "neat" feature than a must, but just an idea that popped into my head now.