Hi riverrrun, every Game Commander or Interface Cable has a different serial number. When you change your Game Commander or Interface Cable, you will need to reactivate your Addon3 by writing in to Ikarus. Pls PM me your new serial number, the Addon3 disc activation code, and your email address. I'll arrange for a new license file for you. When you receive the new license file, delete the old license file in your AFPD directory and put in the new one there.