I tried the following: empty "C:\Users\Rickey\AppData\Local\Temp\DCS" folder (it's safe) and retry to fly? It did not work. Still stuck on the full screen DCS World screen. Next I tried, If you can't reach the main menu, simply edit "C:\Users\Flav\Saved Games\DCS\Config\options.lua" ( ["fullScreen"] = false, ). That worked. Thanks!