"No valid license found"

I bought focusrite studio with cubase le6 last year. I installed it and everything was fine. Had some trouble with my laptop and couldn’t use it for about 6 months (or more). I have upgraded from windows 8 to 8.1. Now when I try to open cubase it says “No valid license found”. What do I do??? Was it just a demo version I now can’t use?

Have you updated your eLicenser Control Center?