annanijagkajnavdkav

I was learning along to the video on Affinity Photo for exporting, and clicked on export, more (or advanced.. I cant remember what the button is labeled). The screen came up for additional settings, but the confirm or cancel button is out of the screen view (even when I try resizing the app's screen) so I cannot click it, or quit the app. Anyone know how to fix this? It's really annoying, and means that I have to restart my entire computer.