Rated 5 out of 5 stars

by catalin on Oct. 6, 2016 ·

Ref: Flawed but necessary Rated 2 out of 5 stars
by MarkUK
I had the same problem. It would ask me to authenticate everytime I would open thunderbird.
The solution: When creating a new google calendar don't forget to create a new session. After you select new calendar > on the network > google calendar it is requesting to select a session or create a new one. Just input your google e-mail. Solved ;)

This review is for a previous version of the add-on (3.1).