Developer reply by Realraven (Axel Grude)
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
To create your own collections, you must have a Mozilla Add-ons account.