Lost saved email after uninstall/reinstall Netscape Mail

I have been using Netscape Mail (fairly recent version but not sure of exact number). I couldn't access the Netscape email program one day - it seemed to open up something just for a split second and then closed it again when I tried to access the email program. I decided to uninstall (using Netscape's uninstall program) and reinstall it (using online download from Netscape website, Netscape 7.1). Unfortunately, I lost all my previous saved email, addresses in the address book. I tried looking on my computer for anything that may be those files but am not sure what to look for or how to "get it back." Help!