Thunderbird 120.0 (64 bit) mesage filters disappear on restart.
I spent a great deal of time adding sub-folders to my eMail INBOX, and then developing MESSAGE FILTERS to to sort my incoming emails into these Inbox-Sub folders. After closing down my computer, rebooting and re-entering Thunderbird, if I need to generate a new Message Filter. After selecting the appropriate data (email address) and go to the Message Filter box, no previously entered filters are displayed. Where did they go? Is it something I am doing wrong? Never had this problem before this new SuperDuper system.