Can't find Skatter

SketchUp version : 2021
Skatter version (Skatter dialog > Options > About) : 1.4.21
OS : macOS Catalina version 10.15.7
Description of the issue : I want to try the Skatter Demo, but I can’t seem to find the extension on SketchUp after installing it on my computer. Not in the extension manager either. I have tried to delete Skatter from my computer and install it again, but nothing changes. When I install Skatter, it is located in /Library/Application Support/SketchUp 2021/Sketchup/Plugins/ so it seems like it’s installed correctly. How can I fix this? Thanks in advance!

A similar issue occurs when Skatter is installed in several locations at the same time.

Do you see “jbb_skatter” files and folder in “HDD/Library/Application Support/SketchUp 2018/sketchUp/plugins”? Not “Users/Library/…” nor “System/Library/…”, but the “/Library” folder directly at the root of your hard drive
Then please make sure the files do not exist in those two other locations.