OK, on Windows, how do I get the normal Windows titlebar back? Not all of us need to cram our messages into every possible pixel. Right now, the menubar is in the upper left. If I turn that off, then the toolbar takes the whole top of the window. I don't use tabs and can't find any tabs options.
I did an upgrade from 16.x to 17.0. The picture above is what my screen looks like.