I have a computer with a WD My Book that came with Retrospect Express. Some idiot reinstalled the operating system on the iMac and deleted the catalog file that links to the backups on the external hard drive. I cannot find another catalog file on the external HDD. How do I go about creating one that will allow me to restore backup files from the external HDD to the computer? Please help because this has been bothering me for hours now and I cannot figure it out.