LOL!
The paths you set under directories have to be saved somewhere. I figured that they were stored in a config file that LB read from. I changed it for consistency. Like I said, I have a 4TB mechanical drive that I'm using as my "retro gaming drive." I'm keeping 1.65TB of assorted ROMS there, as well as a thousands of digital copies of various old-school gaming publications (Nintendo Power, Game Pro, etc.); and Launchbox (because I have an EmuMovies Pro account, and once I have everything set up to my liking, I'm going to download all available media for for everything in my collection, movies included). My system drive is only 2TB (the cost per TB of high-quality SSD vs. high-quality Mechanical is ridiculous), so I'm just keeping everything there. So I figured why not keep RetroArch's defaults there, as well. Plus it's nice having things like that on a second drive in case I ever need to reload the OS (which, to Microsoft's credit, I haven't needed to do in several years, which is a major improvement from the 9X/XP days, when I did it annually as a form of routine maintenance).