Hi,
Just to give you some feedback.
Just installed on Windows 10 x64. MC20 worked fine with multi-monitors (laptop with 3 external), however MC21 only works on laptop + 1.
Also, menus on a monitor in vertical position appear way out of their position, at middle of screen, instead of top.
In my setup those are annoying and probably I'll be reverting to MC20 soon.
Thanks and keep up the good work.