Hello,
To get hover effect you need to edit your product and add gallery images http://prntscr.com/csx49w First gallery image will be your hover image. Then go to Theme Options > E-Commerce > Product Page Layout > Hover Effect > Swap http://prntscr.com/csx4p8
If you did this but still have the problem with hover image, reply back and provide temporary admin panel and FTP access to your site.
Regards