Flip 4 Mac: activated too often - reset possible?

Hi,

when I tried to install Flip4mac on my new iMac I got the following error message:

Your serial number has already been activated on the maximum number of computers permitted by your license.

Is there a way to reset this license so that it gets removed from my previous computers (which I don't have anymore) and so that I can install Flip4mac on my new iMac?

Tony