Axios OK my Bizarre Theory was right. Or was it yours? Autostart doesn't care for seeing a bare-a** .appimage file just sitting in the downloads folder. I looked it up online. Appimage people themselves reccomend 3 places to store your appimage...........two I forgot but the one I did was create an Applications folder in/home/.local.
In the applications folder I stuck the app in a folder with their name on it. ungoogled-chromium*.appimage
went into a folder called ungoogled_chromium
in Applications.
so this works:
/home/brent/.local/Applications/ungoogled_chromium/ungoogled-chromium**.appimage
this does not work:
/home/brent/Downloads/ungoogled-chromium**.appimage
As much as I would really want to know why, what the hell could possibly be the difference, and beg my question to the universe, I will let this one pass. I did it your way @Axios.
SOLVED but still a mystery to me🙂