Rated 4 out of 5 stars

Ha! I wish I would have read this before upgrading Thunderbird! I do have a license for quickFilters, so hopefully that will help with the new QF update, so I can get filtering soon.

This review is for a previous version of the add-on (4.4.1). 

I just uploaded a first beta version for quickFilters - if you are interested:
https://github.com/RealRaven2000/quickFilters/releases/tag/5.0pre37