Rated 2 out of 5 stars

The last Update has not the "choose target folder after sending"... why? It was the most important feature for me.
I can send you a screenshot of your options form.

This review is for a previous version of the add-on (3.2). 

The Thunderbird guys removed a lot of features for add-on writers. Most of this add-on had to be rewritten and some things couldn't be done. "choose target folder after sending" is one of them.