@tyllmusic:
1. Do you see the files inspector.ini and inspector.lua in the same folder ?
2. what is you unarchiver program to unzip the file ?
I'm supposing you're running Reaper v5.28
64 bits isn't it ?
EDIT: I did a test with a new fresh install of reaper 5.28 64bits + the lastest SWS/S&M (2.8.3) on windows (not mac yet. I will be abble to test on mac only tonight when I will be back at home) and it works like a charm.
EDIT2: you should see these files & folders in: $REAPER\Scripts\Inspector