AACK! How do I get back a file Norton AV deleted!!??

I ran a full system scan and Norton absolutely DESTROYED all of my Eudora mailboxes (my email client) which had -hundreds- of VITAL messages.  Everything from payment processing for my business, to shipping information emails, etc..

 

I have Eudora set to exclude my entire Eudora/ folder, as well as all my mailbox ( .mbx ) files, but it DIDN'T!

 

I just loaded up Eudora while NAV was scanning and I seem to have lost the MAJORITY of all me emails in various mailboxes.

 

I'm also now getting repreated "error accessing file... " errors while Eudora is running.

 

How can I retrive all my lost contents???

 

PLEASE HELP!!!