The issue of Missing Libraries has returned in build 18875

I'm also getting, for the first time ever, the error "Not injected into explorer". Is this related? any way to fix? Otherwise normally this is a great tool!

Yes, it's related. If the tweaker fails to load, the options won't work and you'll get the "Not injected into explorer" message.

I plan to fix this, but not before I add support to Windows 10 Version 1903.