AE says I have a duplicated plugin, I don't?

[disqlana]

Every time I try to install this plugin AE stops me telling me it already exists. Every time I check for the duplicated plugin AE says I have the folder for it doesn't even exist as show in the image above. Any idea for what I can do? I am on Mac 10.13.6

[jenkmeister]

Double check you're going to the correct /Common folder. There is one at /Library and one for the Library inside your user folder.