Something happened, and I lost many of the mailboxes in my Joshua Calev account. The Joshua Calev 1.jpg shows how my listing looks now, and Joshua Calev 2.jpg shows how it used to look. Where can I find those missing files (I do have a backup) to restore them? I can't just backup my whole Thunderbird as I'm using 4 different accounts (that's what I love about Thunderbird) and that would overwrite the latest emails I received in my other accounts. I am using Thunderbird Beta 130.0b1 (64-bit). Thank you for any help you can offer.