Installer window: Updating to Ubuntu MATE 20.04

I was trying to do the update for 20.04. The problem is that the window where you have to say "Proceed" is too too tall on my 14 inch monitor. So, you can never get to the "button" presumably hidden waaaay at the bottom of the window.

Tried to resize the window, only the sides will move.

Had this same problem with last update, ended up doing a clean install. Which I will probably do again, eventually. Just can't right now -- too much homework.

Any advice, or if someone can modify the window size, much appreciated.

Thanks, kevin

If you should come upon this problem again, press Alt+F7, a hand icon will appear and you can use your mouse or scrollpad to move the dialog box up until you can see and click on the Yes/No/Ignore buttons.