Hello,
Please update theme to the latest version.
http://themeforest.net/item/the-leader-ecommerce-responsive-mpurpose-theme/5493981
Here is video tutorial how to update theme:
https://www.youtube.com/watch?v=KdWESIIPU1k
The video tutorial is for Legenda theme, but the process is identical.
Regards,
Robert Hall.