...but it refuses to show up under addons. I don't get any errors, so I have no idea what's going on.
I tried to install via addons tab in blender and msi installer, same results, it won't show up.
Looking under "\AppData\Roaming\Blender Foundation\Blender\2.83\scripts\addons" there's the msi file after installing via blender. Tried de-installing and reinstalling -> no change, reboot -> no change.
My blender has barely any addons. The material library is installed.