How to tell if I registered G3.5 ?

[Volusiarider]

Hello
I am wanting to upgrade to G4 and have been reading about some problems others have encountered when they tried to get there Rebates. I purchased my Realflight last June (2007) and can't remember if I registered it or not. I am planning on selling my current G3.5 version, and don't want to find out later that I can't get the rebate because it wasn't registered. When I start up the Sim, it never asks me to register it......soooooooo???
If there is a place to check it, please let me know.
Thanks in advance.
Mike