cannot open any of my projects

i updated the latest version maintanance version of cubase pro 8 and now i cannot ope any of my projects, when i try to open them cubase stops working, why is that so… it was working just fine untill update

I’m trying to use the trial to LE AI Elements 7, and the same thing happens. Too bad, cause I was planning on buying 8 before this… I’m in windows 8.1. I’ve used Cubase for 8 years, and pro tools for 4, so I’ve tried everything I can think of.