removewwindowborder is hidden as a console command for a reason.
It is not for everyone for a reason and it works for a LOT of people. This is not a feature, it is for OTHER people to test!
Works PERFECTLY for me. The issue you're having is because the game is trying to start in full screen mode. You have to set the client back to window mode and then use the command again. This is because "Boarder-less Window" is considered a variant of full screen rather than window mode. On a multi-screen system this causing issue as starting full screen on a second monitor is not meant to happen. Windows doesn't detect it as being there. Clicking anything will cause it to exit full screen mode.
Well done at looking like a COMPLETE idiot for raging. Gold star. <3
Of course I applied the command when it was in window mode, I ain't the **idiot** you make me out to be you know . Besides similar functionality does work pretty well in other games. And my reasoning that it should have been a command line option still holds. It would have saved me for instance a whole lot of trouble as just editing the shortcut would be all that is needed.