Used Aerodrums

Hi,
I have bought a used version of Aerodrums from eBay but I believe the code can only be used once. How can I get hold of the software?
Let me know if I need to provide proof of purchase etc.
Thanks,
Ash
I have bought a used version of Aerodrums from eBay but I believe the code can only be used once. How can I get hold of the software?
Let me know if I need to provide proof of purchase etc.
Thanks,
Ash