You probably installed a new version instead of updating from an older version. Anyway the newest version installs your mail in c:\pmail\mail\admin by default and previous versions installed the mail in c:\pmail\mail.
So you have to dig around on disk a bit, using windows explorer to locate the right directories.
The only thing you have to do is to copy the file winpm-32.exe (which was deleted by the NAV problem) back to the location it had before the installation. The file must be in the same location as winpm-32.dat resides.
After that, create a new shortcut or use the installer and choose the "update" option.
Han van den Bogaerde - support@vandenbogaerde.net
Member of Pegasus Mail Support Group.
My own Pegasus Mail related web information:
http://www.vandenbogaerde.net/pegasusmail/