I saved my Thunderbird profile to an external hard drive, then I reset my pc. I installed Thunderbird and tried to move the profile to the new pc without success. I read various articles on how to do this but none worked for me. I found how to create a new profile and tried that and then moved the mail files into it, but still no success. I must be missing an important step. I can set up new mail but that doesn't transfer years of old saved mail some of which has important keys etc. After multiple hours at this I am very frustrated. Please help.