Rated 4 out of 5 stars

stopped working correctly, you have to turn it on and off so that the folders become colored. A big request to fix. 91.10.0 versio

This review is for a previous version of the add-on (3.5). 

Sorry for the inconvenience, there are a lot of reports like yours so I backed out Phoenity Icons 3.6 and went back to 3.5.
To install Phoenity Icons 3.5 go to the add-on page in the Add-ons Manager, click the Homepage link and install it again from there.

I can't reproduce it here so I do not yet know what causes it.