There is a minor bug (in my opinion) in the window management of 2.1.04. If a window (the move window in my case) is disabled because the laser doesn’t support it (Galvo laser in my case), the control buttons to remove the window are disabled as well. You can remove it via the window menu, but I think if a window like this is disabled, the controls should stay active (so you can close it easily since it’s not required).
Even better, it should not even appear.
Yes, I did it this way, but it’s still a UI design bug in my opinion. A window might get disabled but window controls shouldn’t. 
It’s not a major issue, though.
I’ve passed it along, thanks for bringing it to our attention.