Hello Thunderbird Community, I am not tech savvy and I really need help recovering lost folders and e-mails that were stored on Thunderbird. The trouble started yesterday when I was unable to open Thunderbird due to an "XUL Runner" error message. A Best Buy Geek Squad technician was able to fix the glitch and restore Thunderbird, but in the process all of my folders, subfolders and very important business e-mails seem to have been deleted or lost. Three Geek Squad agent spent several hours trying to restore these folders and e-mails, to no avail. Strangely, my inbox seems to have not lost any e-mails, but my Trash folder is empty and my Sent folder only contains a few random e-mails from 2009-2017. But all of the folders that I created, such as "Marketing" and "Invoices" and "Contracts" and many more, are nowhere to be seen. Does anyone have any tips on how I might recover these folders and e-mails? Thanks, Darren