The newest version is 68.1. You can download it for your OS. Remember to uninstall your old 32 bit version first. Then, install a new fresh 64 bit version! It is faster than its 32 bit sibling. Also, some plugins are not compatible with this new version. Please uninstall them and wait for the plugin update. KeeBird and Mailhop are waiting for renewal. https://www.thunderbird.net/en-US/thunderbird/all/
