PhotoImpression 6.1

Question

Can you tell me where I would find my serial number. The PhotoImpression 6.1 cam bundled with my printer. When I go to register the product the serial number is supposed to just appear according to the information on the ArcSoft website but it doesnt. Becuase I cannot register the product without the serial number I cannot upgrade to the 6.5 or email my question to ArcSoft becuase I am not a "registered member"