It appears as if an app, even though sideloaded, will update itself if it's already available for Android TV. I only want some apps to update, not all of them. I figure it could be an option to set all apps to auto-update and sideload every app you manually want to update, but unfortunately it isn't working.
I can't believe there's still no possiblity of setting auto-updates for each app individually. Surely it wouldn't be a hard thing to fix?
Nope, either gotta auto-update all or none. That's just the way it is and will probably always be. I imagine it's an issue of 'how do you do selectable auto-updatable apps if the person had 100s of apps installed'. Seeing as there probably isn't a good/efficient/stable way of doing it for such a large number of installed apps, they just decided to go with all or nothing.