IT WORKS. Fix for anyone who runs into this snag:
1. Uninstall AURA Service as mentioned.
2. If Armory Crate doesn't allow you to do an update, just simply run the installer again. The installer will seemingly effectively do exactly as the steps entailed.
I didn't have to do the other steps in a special order (I had the plugin and iCue already installed). It seems like ASUS is the problem here.