I'd like to make sure I'm backing up the ATV specific settings. Where are they kept? They don't appear in the settings.cfg.
There is a file called atvsettings.cfg that is created/saved on a clean shutdown (ctrl-c)
Ah! So it was never written because I had never stopped the process. I’m running it on my openwrt router and I’ve never stopped the process. 
That would be it exactly.