UI resolution issues post-reinstall

[Scofflaw]

Hi everyone,

I reinstalled FFXIV onto an SSD today in order to help improve loading times. Everything worked fine, but when I got back into the game, the UI elements were FAR larger than they were before, to the point of unusability (link to picture)

Before, all of the UI elements fit more or less where they are now, they were just smaller - in fact, before the reinstall I had to boost everything to 120% to get them to a decent size.

These are what my relevant options currently look like: (link to picture)

The weird resolution is because my monitor is pretty big, so I play with FFXIV taking up one half of the screen. This is unchanged from the way it was before. Unfortunately, I didn't know that I could back up my system settings, so that's out. Changing the UI scale to 90% and 80% doesn't work, either - everything technically "fits" if I go as low as 60%, but then the buttons are tiny and unreadable.

Any idea about what happened and how I can get it back to normal?

Thank you.

EDIT: I found a screenshot of what the UI scaling looked like before to give you an idea: link

EDIT 2: As an experiment, I re-reinstalled FFXIV onto my HDD, which mysteriously fixed the resolution issue. I have no idea why, since the settings are all exactly the same. A mystery for the ages, I guess?