I'm not sure precisely what you're saying, sorry.
If you're trying to get the game onto a different computer, the best way to do that is to get a fresh download of the installer. This isn't one of those games where the demo version is unlocked by putting in your email address. THe demo and the full version are separate.
I can send you a new download link email (which will also remind you what your registration key is) if you forward me the receipt email you got after buying the game. (It
did say 'Save This Email' on it

) If you don't have that email anymore, then I can try to look up your order record if you know what name and email address the game was bought under.
Basically, find whatever information you can about your purchase and send it to me either by PM here or by email to
owner@hanakogames.com
If I can find your order record I can send you a new download email. Once you have the installer you can put it on whatever computer you want, and then use the registration code that is printed in the email to download the new updates.