Mostly just the title. After doing a clean reinstall of 3ds max since it was a bit messy, I haven't been able to get the ProRender material library to appear in 3ds max correctly. If it appears as a group in the Slate Editor, none of the BMP files are loaded, and all the materials are featureless grey and render black (on ProRender). In this case, I wasn't able to locate the BMP files, and was unable to find out where the installer is placing them by default. After installing and reinstalling a few times, they aren't appearing in the Slate Editor under any group at all.
Attached is what I was able to see on the best of my install attempts -- reloading the groups didn't do anything in this case.
It almost seems like the BMP files aren't installing.
Ryzen 7 1700
Radeon RX 590 8GB
3ds Max 2019