Configuration

The Configuration dialog box (see picture below) contains a set of options to control the way Thunderbird Fix It backups folders before making any changes.

There are three options:

Do not create any backups
The original folders and messages will be discarded. This is not recomended. You will not be able to revert any changes if you change your mind or in the unlikely case that something goes wrong.

Backup original folders in Windows temp directory
All folders to be modified will be renamed (a timestamp will be added in their name) and copied in the windows temporary files directory. If you change your mind you can undo any changes simply by renaming and copying them in your local folders directory. This is the recomended option.

Create Backup copies in same directory
Backup copies of original message folders will be kept in the same place as the modified folders by adding a timestamp in their name. Both the original and the modified folders will be visible from Thunderbird. You can delete either from inside Thunderbird as soon as you decide whether you want to keep the changes or not.

The Configuration dialog box can be brought up by selecting File -> Configuration from the main menu of the program.