Enter/Esc does not work. Like I said, it's not a cursor position issue. The cursor is doing everything it should. The "Continue" button glows when the cursor is hovering over it the way it's supposed to. It just does nothing when I click it. The window stays open, and the only way to get rid of it is to quit the program.
What is 10.15.1? Is it an updated version of the launcher? How do I see if it's available?
EDIT: Okay, I figured out the problem I was having. That "continue" button is indeed broken, and I'm not sure why it was opening up the EULA every time I tried to fiddle with enabling/disabling mods, but it wasn't the EULA that was preventing me from opening the game. It was the issue in the other thread about EU4 not working with MacOS Catalina unless you delete a particular folder. I've deleted said folder and I can access the game now.