First and foremost, I'd like to say that I'm posting this here because there is no dedicated subsection for this game (at least that I know of, I checked and couldn't see one).
I have a weird issue with the game, in which I was able to play it normally the last time I ran the game, but now whenever I start the game, I get black bars covering the top and bottom of my screen.
I run the game in fullscreen mode, but the screen selection does not extend to the corners of my monitor.
I have two monitors, a 28" VP28 UQG 4K monitor and an LG 24" 1080p monitor (I forgot the model, I posted it in a thread about my 4K monitor).
I play the game on the latter, in 1080p.
I tried to search for a solution, but no-one seems to have one:
I also tried to do the following, but it didn't work, perhaps due to me not knowing how to use it properly: