I don't have a settings.ini file in my Utau folder, and the only suggestion I could find was that I'd installed it before setting my locale to Japanese, so in order to access it I figured I'd uninstall and reinstall it. Of course, just to be safe, I'm backing up all of my voicebanks and relevant USTs!
The problem is, I have over 15GB worth of voicebanks, so it'll be like, an hour or three... and then there's not even a guarentee this'll work...
Ah well! With that many VBs, I was overdue to back them all up anyway. I guess I've got plenty to do in the meantime.