Coupon Code Form Not Appearing On Cart/Checkout

Hi, I’ve just upgraded to Woocommerce 2.0.5 and installed a new theme (The Retailer – http://themeforest.net/item/the-retailer-retina-responsive-woocommerce-theme/4287447).

After doing the above, it seems that the Coupon Code Form doesn’t seem to show up in the Cart/Checkout page. Yes, I have enabled coupon on the Woocommerce settings page.

After going through the .php files of WooCommerce under Plugins>Editor, I noticed most of the .php files’ status is set as (Inactive). Could this be the problem?

Thanks in advance.

http://wordpress.org/extend/plugins/woocommerce/