Hey! If you're fullscreening Live I do not believe it is possible. I would have to convert MiniMeters to a menu bar app. If you don't fullscreen Live you should have no issue clicking "Pin To Top" from within MiniMeters. Let me know if that helps!
Im having the same issue and I am not in full screen mode in live
What issue are you running into? If you click the Pin To Top button MiniMeters will stay above every window (except for full-screen windows).