This site is being deprecated.
Please see the official X‑Plane Support page for help.
You should check your licence key. If you have bought X-Plane here you can now install both X-Plane 10 or X-Plane 11 with the same licence key.You can read more about "Installing the X-Plane 10 Digital Download" here. More info aboud downloading older versions you can find here.
If you have an invoice (from here) you should have an activation code. The digital download product key is only provided in the purchase confirmation that is emailed after completing your purchase. Check your spam folder. If there is no email then contact X-Plane suport at firstname.lastname@example.org or Customer Service at email@example.com, otherwise contact your local reseller.
This site is no longer being actively maintained.