In switching from an old computer to a new computer, I have lost all of my old e-mail and my address book. Prior to decommissioning my old computer, I backed up a folder named Mozilla Thunderbird that was in Program Files on my C: drive to an external hard drive. Now that I have fired up the new computer and downloaded the newest version of Mozilla Thunderbird, I see that I seem to have made a critical mistake because I cannot find my old e-mail or address book anywhere in that old Mozilla Thunderbird folder that I backed up. In the folder that I backed up, there is a sub-folder named "Defaults", and in that there is a "Profile" and "Pref" sub-folder, but the Profile folder is empty and the Pref folder only has 1kb java script file that doesn't appear to be relevant. Is there something else I should be looking for somewhere else? What should I have backed up from my old computer? Where would it have been situated?