I'm having the same problem.
I downloaded the demo version and I evaluated all of the features in Max 2014 and everything worked very well, well enough to persuade me to buy a license, but after installing the official version yesterday nothing works. I try to brush the guides, the guides start to flash in a strange way and then it crashes. If I try to add a Surface Comb modifier it crashes. Basically it's unusable in Max 2014. I did install it on Max 2013 as well with the same installer, and that works flawlessly.
I'm runninng on Windows 8 Pro.