This site is being deprecated.
Please see the official X‑Plane Support page for help.
The product key is part of a newer product: X-Plane digital download. It was not available when you purchased the DVDs two years ago (it is only about 1 year old). If you insert DVD 1 from your set it will unlock X-Plane 10 from demo mode. You may also buy a digital download product key but it is a separate purchase and fee.
This site is no longer being actively maintained.