I have purchased the app but didn't expect the experience is so bad. I was able to install Microsoft Train Simulator under Windows 10 64bit. After I installed Open Rails in the same bottle, some error window came out when I wanted to open Open Rails. The first few lines are stated with "System.Security.SecurityException: GetCurrentTokenReturned error 24138304...". I have no idea but tried to solve this issue. I re-installed the same thing under Windows 10 32 bit and Windows 8 32bit, then the installation of MSTS and Open Rails are successful. However, when I was excited to start Open Rails by clicking the button "Start" in the app, the MSTS game interface is not even shown but the whole thing go back to the Open Rails window. I was quite frustrated to deal with this issue by re-installing under different environment but all to avail. It was confirmed the "Sytem. Security.... " thing will jump out in 64 bit OS and the app just simply didn't bring out the game page if I installed in 32 bit OS. Therefore 2 issues here for you.