Hello,
Thank you so much purchasing our theme and contacting our support center.
Firstly, you need to update our theme to the latest version that available on ThemeForest. Then you will be able to easily upgrade your Visual Composer plugin to the 5.0.1 version via Appearance -> Install plugins.
You can create your Sale pages with Visual Composer using our “Products” element that allows you to show any number of sale products. Note that you are not able to use pagination links for your products on any other pages than shop listing or product categories.
Kind Regards
XTemos Studio