I was messing around, trying to click something off, now all my UI is gone. Not even the speedometer is there. Even apps don't work. Anything I can do to get it back?
Close, it's Alt+U by default to hide or unhide the UI. If that doesn't work, restarting the game should fix it as the game always defaults to showing the UI. Afterwards, check controls > show advanced bindings and look under General. It'll have "Hide UI" and tell you what binding it's set to. If none of that works, you might need to disable mods or clear cache and verify integrity in the BeamNG.drive Launcher to troubleshoot.