Yeah each free form text entry field becomes both a image category and a new folder that images will get sorted into. If you need to clear out the empty bots you can just delete the contents of stowbotlist.json. There will be a cleaner interface eventually but this tool is very new and still a little rough around the edges, especially in those cases where things go wrong. The demo video on the website shows an example of things you can request and how it would work.