Rated 1 out of 5 stars

Doesn´t work.
Windows XP, TB 7.0.1

This review is for a previous version of the add-on (1.0.1-signed.1-signed). 

Not in 7.0.1, no, which is why it's marked as "Works with Thunderbird 8.0 - 10.0a1". It'll work in 8.0.