my game user settings : (try just changing the res, for both places)
It’s in the demo folder, …saved/config/windowsnoeditor/gameUserSettings
not in app data location…
[/Script/Engine.GameUserSettings]
bUseVSync=True
ResolutionSizeX=1920
ResolutionSizeY=1080
LastUserConfirmedResolutionSizeX=1920
LastUserConfirmedResolutionSizeY=1080
WindowPosX=-1
WindowPosY=-1
bUseDesktopResolutionForFullscreen=False
FullscreenMode=0
LastConfirmedFullscreenMode=0
Version=5