The best TB addon Rated 5 out of 5 stars

This addon is very important for me and probably the best one for thunderbird. There is a small problem I have started seeing offlate. Not sure what triggered it, everytime I open Thunderbird, I get the First run assistant Pop-up. Even though I click on "Review changes" or "Apply changes", nothing happens and the pop-up again shows up the next time I open Thunderbird. This is TB 17.0.2 on Ubuntu 12.04.

Edit - Uninstalled and installed it back and the problem seems to have gone.

This review is for a previous version of the add-on (2.5.2). 

Is Thunderbird shutting down properly? Which version of the addon are you running? (You may want to upgrade to the latest one.)