Hi there,
If you remember what e-mail address you used when purchasing the game, you can resend your key to that address by using the Data Realms Licensing site. Just click on "Resend key via e-mail" and type in your billing address, and you should be good to go! Give it some time to arrive if it doesn't show up immediately, but it should be there pretty quickly. If it still isn't in your inbox or junk/spam folder within a day or two, then send an e-mail to support(at)licensing(dot)datarealms(dot)com.
Hope this helps!
