after a reinstallation of Windows (or changin the PC) you also have to set up Thunderbird again completely new (accounts, settings ecc.). It would be nice if you could export all this to a file that you can import again later.
you can export all to a .zip file using the menu Extra --> Export
The problem for me: my profile folder is greater than 2GB and I only want to export my account settings and passwords to use it on a second computer. There is no (comforable) way only to export this.
It would be great if the user can choose via some checkboxes, what exactly to export.