Maschine 3 sometimes has a lot of bugs when adding instruments, you can't move these windows or even turn them off. Sometimes even ESC doesn't work, like now. There's nothing you can do about it. In addition, Maschine removes instruments, changes chord sounds to other ones (spooky sound), after exiting Chord set it always changes the scale to the horrible W-H diminished. That's nothing, but these big windows without "X" in the corner completely prevent you from using Maschine projects.
I'm reporting this for information, because maybe someone hasn't reported it. Best regards!