Rated 5 out of 5 stars
Just upadated to Thunderbird 45.x and this wonderfull addon isnt compatible. Please update for v45.x.
Planned since February, but unlikely to happen soon due to real life work; there have been incompatible changes in Thunderbird breaking themes, which means I need 1-2 full days to basically re-write the theme from scratch (and right now I cannot afford that). Sorry!