First, if you are a little slow, like me, you may still be showing NULL system after launching from the context menu. Ashamed to admin I wasn’t running Steam when I tried it first time. He very clearly explains it, but if you are, again, slow like me, you may have paused to run it and spent some amount of time troubleshooting before you thought or unpaused.
Second, the launch game from uproject context menu is the best thing I’ve learned yet. Thank you! I knew you could launch it but I didn’t realize it was launching it like a packaged game.