FWIW, changing resolution from 1728x1117 to 2056x1329 (those roll off the tongue...) fixed full screen, and let me set it windowed to go back to my regular resolution. I'm old and my eyes suck, so I can't use the fancy high res small print you youngsters seem to like so much.
Obviously a small deal for nerds, but having it first launch into something where the options button is off the screen and you can't switch to windowed mode isn't ideal...
