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I've downloaded TB 45 but can not install it. I already have 38 and want to update it?

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I have TB 38 already but want to update to 45 so I can install Lightning. How do I get the new version TB to install? The new version downloaded to a folder (thunderbird-45.1.1.tar.bz2) which will extract, but where do I go from there?

I have TB 38 already but want to update to 45 so I can install Lightning. How do I get the new version TB to install? The new version downloaded to a folder (thunderbird-45.1.1.tar.bz2) which will extract, but where do I go from there?

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You have neglected to mention which OS you are using. The tar.bz2 suggests Linux.

Does your distro not offer TB 45 yet?

What makes you believe posting the same question twice is a good idea? Continue at https://support.mozilla.org/en-US/questions/1128634