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suddenly every time i start the program it has lost my gmail account and i must re-build it

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it was working fine.. all of the sudden when opens, has no account and prompts me to re-configure one from scratch when i configure my gmail, it works ok but after restarting the problem reappears ty

it was working fine.. all of the sudden when opens, has no account and prompts me to re-configure one from scratch when i configure my gmail, it works ok but after restarting the problem reappears ty

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If you are using IMAP and don't have any messages at all stored in your computer that you will loose, just close TB

Go to C:\Users\YourUser\AppData\Roaming and delete the Thunderbird folder. Start over,

If something was corrupted it's gone already and I think it'll work.