I have used Thunderbird for a long time and now I changed my internet provider and have a new e-mail address, but I'm having trouble getting Thunderbird to recognize it. I uninstalled Thunderbird, but when I try and re-install it, it goes back and picks up my old address with all my messages. I guess what I need to know is how to reinstall Thunderbird so it thinks I'm a new customer. I backed up my old account so I wouldn't loose my address list. I'm stumped