I had the same problem. It seems like it has to do with the UI (User Interface) size. If you go to options and you scroll through all that noise, you'll find a UI Zoom setting. Set it to 100% and you should be fine, although all the text will be hard to read. Alternatively, the button is still there, it's just off-screen. I was able to click it, but it took a while to find when i couldn't see the mouse, lol.