Try RECUVA but let's cover a very very important item.

You shall NEVER use this drive to boot or write to until the files are safe. NO RECOVERY APP OR PERSON SHALL WRITE TO THIS DRIVE UNTIL THE FILES ARE COPIED OUT.

AGAIN, if an app recovers the files by writing to this drive you are doing more damage.

-> If recuva can get the files out, next up is www.drivesavers.com