I bought Studio 11 a

Question

I bought Studio 11 a year ago.Is it only good for a limited time?I did a few projects - no problem.Now I can start a new project. When I close itdown and try to bring it up againseveral pictures don't come up, saying "loading error"or show a blue exclamation mark.I deleted the whole program and installed it new again.A question pops up "do you want to buy"?Or that my trial period has expired.I thought once I bought the program I could use itfor an unlimited time?I would appreciate your help.