I've had problems with it too. It now refuses to find half the objects I had in my scenes and although it seems to let me import objects, via the Import menu, they don't actually appear in the scene. That's the last time I install a new version as soon as it comes out. I'm going back to my old philosophy of being one step behind the cutting edge. Now, where's my wire brush? I need to scrub this version from my hard drive.