I used the an installer from a friends hard drive he gave me his computer for my birthday, none of yhe rpg makers I download are allowing me a free trial except the 2000 versions.
Then you need to re-download the installers, and register them to your own email-adress.
Even then this might be blocked due to previous trials, if your friend had installed the trials before then they will have stored a "trial expired" flag on that computer already.
Send a support ticket (on the top of this site, right side) about that, but most probably you'll have to delete and reinstall windows to get a clean system (unless the support people from degica have a different solution)