This site is being deprecated.
Please see the official X‑Plane Support page for help.
I'm not from Laminar Research, just a fellow simmer in the UK, but are you still trying to install a copy of X-Plane 11 with the X-Plane Installer.exe application or are you trying to open the X-Plane 11.exe application itself?
Please click on following link and advise which app you are trying to open?
This site is no longer being actively maintained.