Keys were sent out to the Paypal email addresses from each purchase. There has not been a way to alter the email address from the Paypal purchase (I’ve tried myself). If you have not received your key at that email, you can scroll down to the bottom of the page on the main website for the game to the “contact us” section. There you will find multiple avenues for contacting the team in order to obtain your key. I suggest you have your email receipt from Paypal at hand, and we’ll get you sorted ASAP!