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Update Thunderbird 68.12.0 to 78.2.2

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Yesterday I updated Thunderbird 68.12.0 to 78.2.2 (by the standard automatic way within Thunderbird) but it changed my 64 bit version to a 32 bits version. How can I get a 64 bits version of 72.2.2? Thanks. Antonio

Yesterday I updated Thunderbird 68.12.0 to 78.2.2 (by the standard automatic way within Thunderbird) but it changed my 64 bit version to a 32 bits version. How can I get a 64 bits version of 72.2.2? Thanks. Antonio

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