I was moving an email from Inbox to a folder (not under local) under my user and received error " current operation on Z Purchases and Receipts (Failure) folder does not exist. I could see the folder /sub folders on my screen listed. I closed and restarted Thunderbird thing it was a glitch and the folder was gone - although others were still there. I went to Activity Manager and it listed the missing folder as deleted along with all the sub folders under it. How can I Recover this data? I am running Windows 10 / Thunderbird 45.1.1 with calendar.