THE PROBLEM: You want to use Thunderbird 102 right now, but your client is not auto-updating.

THE SOLUTION: In order to ensure smooth, bug-free upgrades, we're rolling out the automatic update from Thunderbird 91 to 102 gradually. However, you can download Thunderbird 102 manually from https://thunderbird.net and install it in the same location you have Thunderbird 91 installed.

This will serve as an upgrade from 91 to 102, and your data, settings, and profile will be preserved.