Puntuado con 4 de 5 estrellas

I have used this add-on (previous version) for years. Love it! However, the latest version has a bug, at least in Thunderbird 68.4.1: The folders do not become colored until I drag the pointer across the folders; then they change to the colors I've assigned.

Thank you for your feedback.
I am also aware of that bug.
Correction will be included in the next update.