When I opened my computer this morning after it was asleep, ALL my Thunderbird accounts were gone! I have GMail set up to go through T'bird, and all my emails are still at GMail...but everything is gone on Thunderbird. Running Windows 10 on a PC, and have had T'bird for years. AND I just discovered that my address books are also missing...there are just a handful of contacts listed in "Personal Address Book," and many missing from "Collected Addresses" & "All Address Books"! (BTW, my profiles still exist in my T'Bird folder.)