Hello Bixby,
If you can send a PM to Lewis above, he'll be able to send you some further instructions on getting your FSPilotShop purchases added to your account here on the A2A store.
However, if you've kept a copy of the original installers for these products, you should still be able to install them to FSX on your new PC, so you won't actually gain anything by redownloading from our server. In either case, after installing your A2A planes on your new machine, you should download and run the automatic updater which is available
here and you should be good.
Thanks,
Nick
A2A Simulations Inc.