@Mirkec
I am sorry but I also have to report that I am having the exact same problem also. I can install this fine.. but after 24 hours it tells me cert is not vailid and to reinstall. No matter what I do or try, I CAN NOT get it to accept the license again.
Now every time I try to insert the license it says invalid... I even rolled back two days ( system restore ) and tried to install it again, but it wont take the license no matter what... SO yes it does work the first time you try it, but it wont last and it cant be installed twice. I really want this to work...
Thank you .
PS... has anyone got the repack to work ? I cant get that to accept the license either.. :/