This plugin works only with Multi Product Order Form 2, in order to use this plugin you should have Multi Product Order Form 2. It is sold exclusively on CodeCanyon.
Your order form, your rules. You can manage your order form with ease!
Literally, just copy/paste the plugin to the plugins folder of MPOF2. It will install itself automatically when you reload your order form 
You can add extra JavaScript or CSS Codes, easily.
You can easily make your changes on the admin panel.
