Zend certified PHP/Magento developer

Choosing members from a group when emailing in Thunderbird

I (often enough) wish to send to a group minus one or two people.

This has been answered before on SuerUser and again on Mozilla Support, but Thunderbird has changed the interface and also rendered add-ons non-functional.

When I show the contact list in the side bar (F9), I can see my group, but there isn’t any way to drill down and show the members in the sidebar to select from. Right click no longer shows “properties” as an option. Is there a way to accomplish this?