Same, even with the setting unchecked some unreal games do launch SteamVR in steamVR plugin is enabled. If I disable the plugin in my own projects it seems to fix the problem. There is also a way to enable VR through the command line with -vr so I wonder if there is a way to disable it too… hmm. It’s really annoying for me because my son like to play an alpha version of a game that has SteamVR enabled when the game doesn’t even support VR in the first place. So I have to make sure the headset is unplugged before I can fire up the game.