I found the apt, but that doesn't look like the one that allows you to update the LG specific applications. It just takes me to the LG marketplace. I've seen the 'Update Center' even on the Sprint version. It's in the setting area and allows the update to these LG specific applications.
This is what I'm looking for? From the Sprint version - > System settings > System updates > Update LG software. That doesn't exist on ATT version.
Device: HTC One Developer Edition