Landy wrote:

full screen flickering? flicker is probably a windows 10 issue, the fullscreen is a bad setting. you either have the game running in 640 mode, or you turned on fullscreen in the client settings.

make sure "sinfo.txt" says the following

WindowScreen
Complexities
HalfMemory

I have been able to fix it. Apparently I had to open a folder or anything and use that one instead. I only just figured it out, my bad