First, thanks for giving this a go…
I tried it as well VR and using your instructions above to reset. It does not work in VR.
I have a RTX3090 and intel 9…HP Reverb G2.
When I press on the custom window button in the toolbar while in VR it just breaks the toolbar (freezes it). If I then Alt-Tab out of VR and into 2D, the map is open, the toolbar is working again.
Maybe that helps you discover the issue. If you do not have VR, and you want to try changes to the software and see what happens, I could possible help. Message me in the forum.
PS I have a single screen running when I tested it and the game is in full window at all times.