Piracy it's not a reason why you won't get a refund for that reason, also considering pirate copies are in fact just more advertising for us, since nobody want to be stuck with outdated versions, considering how often GSX gets updated.
Switching simulator was your own choice, so I don't see how we should economically contribute to your own computing choices.
Would you even think asking refunds to Apple for all your App Store purchase, just because you "switched to Android" ? Or all your MS Store purchases, because you switched to the Playstation ?
Try that, if you manage to obtain it, I'm sure you'll make front page news...