This site is being deprecated.
Please see the official X‑Plane Support page for help.
Support for the Steam version of X-Plane is handled by Aerosoft. Contact them at aerosoft.de for additional assistance. I was not aware that the Steam version used product keys. I thought your Steam client log in was your authorization for your purchases through Steam.
If you purchased digital download from X-Plane.com, your product key should be in the email confirmation you received after your purchase. If you have lost it, please contact support at firstname.lastname@example.org
This site is no longer being actively maintained.