Amazingly, all of my folders, including local folders, appeared last night! And, this morning, the blue rectangle with the "+New Message" appeared.So, as of this moment in time I am good.
A total disaster. I cannot find a write button to compose and send an email and all of my folders with all of my saved email messages have disappeared immediately after I downloaded 115.2.2 today. I have been using Thunderbird from the start, but am ...