How do I Install Albion ONE on another computer?

I recently purchased a second computer. I have installed Cakewalk, Spitfire, Native Acces, and Kontak. For some reason, Native Access is not showing Albion ONE in the "not installed" menu on my second computer. I have tried registering Albion ONE on it again using the serial number, however an error window comes up with a message notifying me that I have already used that number. How do I obtain another serial number so that I can install Albion One to my second computer? Thank you!