New version of Mailbox Alert! Not much change in the outwards appearance, but there's a total rewrite of the way of storing the settings. This should fix the problems that some people were having when changing locales. And as a side-effect, settings are now kept when you rename a folder.

Oh, and the de_DE locale has been added.

If you update and then revert to an old version, the settings will be gone in the old version. If you plan on going back, make a backup your prefs.js file before you restart Thunderbird :)