product image not displaying.

Okay so I just bought this theme from theme forest. https://themeforest.net/item/mazine-wordpress-theme-a-wp-ecommerce-theme/198602. I installed it and all the plugins. One of the plugins is wp-ecommerce. I tried creating products but there is no featured image option. I tried to just insert an image in the post but that does not work either. The website is https://www.swlpc-testserver.com Please help me anyone.