How to install X-plane? X-Plane 1.x has no sources. X-Plane 1.x can be found on the developer's site At the moment, there is only the assembly file x-plane.exe, which contains all the necessary files for installing the program, and the README.TXT file that describes the installation process. X-Plane 1.x contains one function - "Bird.exe". To install X-Plane 1.Ñ… it is necessary (if X-Plane 2.Ñ… has not been installed yet): - run the assembly file x-plane.e