Final Cut Pro 10.4.10 Refuses to Update

Tried everything with the App Store today. It shows Updates available for FCP (10.4.10), but the Update button does not work, not for FCP, not for Motion, not for Compressor. Nothing happens. What a pain Apple.

Had to delete FCP (10.4.9) and install from the App Store (Cloud icon.) That installs the whole app to the current version, it just takes much longer.

But why? Why?

Apple Pro Apps and Apple Pro Video Formats Updates

Apple Pro Apps, Final Cut Pro, Compressor and Motion got an update on 11/15/18, showing up in App Store:

Apple Pro Video Formats 2.0.7 is also showing up in the Software Update on Mojave:

FYI here are the differences between 2.0.6 and 2.0.7:

Error 503 from App Store

Today I get an Error 503 from the App Store, and I cannot update. Hmmm...

Update: Looks like the update went through, even though the message kept popping several times. Back to work.