Tweaking software often adds registry entries to modify update functions.
This is how I cleared them.
This doesn't need to exist. The entire AU can be deleted.
HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU
UX appears to be a legit entry. Delete every item in Settings
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate\UX\Settings
Restarting should return full control to Update.