I tried all the things you posted here (.net framework repair, re-install 11.3, and the beta) to no avail. I got launchbox to start but it was basically like starting over. Asked to import roms. I did and it was able to play, but without my old steeings. And bigbox did not start at all. Now, neither will start. I see in my launchbox folder, there is a back ups folder. Is there a way to restore to an earlier point using those? And if so, how do i do it?