Max Window corrupted?

After having installed the RTC Libraries onto the latest version of Max, running on Windows 7, I’m experiencing an annoying problem with the Max Window. The issue is that I cannot clear any message, whether those sent by the Print object or error messages. When I click on the X at the bottom left of the window at best nothing happens at all and at worst Max crashes.

I have carried out two clean re-installations and the problem remains. I’m thinking something has possibly screwed up my Preferences file but I can’t find this anywhere in the Cycling 74 folder…Any suggestions gratefully accepted as this is driving me nuts!

Cheers

Paul