I worked for a company last year that provided a subscription to the CC services and when I left the company they revoked the right to use under their account. I left the programs on here because it was a pain to uninstal them all. I found out that using a 3rd party app to do it wasn't a great idea after my MacBook Pro started crashing occasionally so I decided to leave the remaining programs on. I just bought into a CC subscription for myself and now when I try to launch Illustrator it prompts me for a serial or to start a trial. I don't know if that has anything to do with my trial issue but I would love to have the programs out of trial mode because it is an irritance.
I think you need to remove the old registered program and install the new ones that you register with your account
Remove license on a computer http://forums.adobe.com/thread/1442423?tstart=0
Discussions of RE-installing
-using the cleaner after uninstalling and before reinstalling may help