OMG., I think I get it. In the template to post to the forums, it says: "5. Reset OS?"
This software, Armoury Crate, is a "Trusted Microsoft Store app". That's the problem! You don't design software for the MS Store, it is literally THE WORST. Guys, that's the bad news: it is NEVER going to work (again) until:
1) ASUS come to their senses and re-program their software (from the ground up) to be normal, or
2) we destroy our Windows installation and setup, in order to regain this functionality.
So, so stupid. Unbelievable.