This extension was part of Blender 4.1 bundled add-ons. It is now offered as it is, with limited support.
No changelog for this release.
This extension does not require special permissions.
It's a great add-on. Worth a rating of 5. I sorry this 'add on' was not automatically carried forward to Blender version 4.4
"Material Library VX" doesn't tell users what it does(?)
good