Newest Audivid Converter. I added when batch converting m4b's, it'll stick with the first option picked rather than asking every time, and if the split option doesn't work, it'll beep twice to rescue with a whole mp3.
https://www.dropbox.com/scl/fo/dky14sq5285lip2pfen28/AJEhNSNzOTqQu-REOBUCRQs?rlkey=hi0y8oq7k7rdfnntpwp3mpda2&dl=1