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My entire Thunderbird profiles folder is missing. When I open Thunderbird, it's as if I am installing it for the first time.

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The old profiles folder is gone. A few days ago I updated Thunderbird, but I did not ask to delete anything. When I open Thunderbird now, it asks me to set up new accounts. A different named, mostly empty profiles folder has replaced what used to be there.

The old profiles folder is gone. A few days ago I updated Thunderbird, but I did not ask to delete anything. When I open Thunderbird now, it asks me to set up new accounts. A different named, mostly empty profiles folder has replaced what used to be there.

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