I'm embarrassed to pose this question given that I've been using MB for more than ten years, but where the hell is the Music Explorer? I know I've seen it. Even recently. But I can't find a way to make it appear. It's not in the View menu. Nor in the Tools menu. And I've looked in the Panel Arrangement configuration and don't see it there either. Right-clicking on a track doesn't show it in the context menu.
I've decided that it's time to look at some of the features I haven't used in a long time, or have never used.