Hello, here are some tips for Windows 8, 8.1, 10 with X-Plane 10 (or 11): Some older installer (for Airports etc) must execute in Win 7 or 8 Mode. Otherwise there is an error message like " The installer cannot run in this UI mode....". Solution: For example: Right mouse button on the installer exe, properties, compatibility: checkbox "run in compatibility mode for..." and here select Windows 7 or Windows 8.. And at the bottom of the Compatibility Window choose "run as administr