UI suddenly changed for some characters (not green server) + file location question

[Zuranthium]

Logged on after not having done so for over a year and found all of my characters except one to suddenly have a different UI. These are Red/Blue characters, so it's not a Green server issue.

This is how my inventory UI is supposed to look, which just one character still has - https://imgur.com/a/QqnVlMU

This is how my inventory now looks for every other character - https://imgur.com/a/68lnaev

There are a few windows and such that are different for the other characters as well. What would cause this and how can I fix it?

Also, I have a question about where my EQ files are being stored. Previously it seems my screenshots and some other files were saved to a "User/AppData/Local/VirtualStore/Program Files/Everquest p99" location. Now when I take a screenshot it's instead being saved directly in the Everquest folder (which I now have as its own folder on the drive rather than under Program Files). Should I be doing anything with those older files?