Add the following features to your cart and the "checkout option" of the cart page:
- Add "Reward Points" Column in cart
- Add extra Remove buttons beside the previously applied Discount Method/s (Coupon, Voucher or Reward Points) on your shopping cart
- Patch the action executed when the Apply (Coupon, Voucher, Reward Points) button is pressed so that null or 0 values are allowed and automatically remove the previous applied discount method.
- New notification messages were introduced, so that it is clear that a user must be logged in, in order to be able to use his/her Reward Points while purchasing a product.

DEMO SITE: http://opencart.dyndns.biz
Credentials:
Username:demo (e-mail: demo@demo.com)
Password:demo

For test purposes then following are also available:
Coupon Codes: 1111 and 2222
Voucher Codes: 1111 and 2222

****** It is completely based on VQMod and no overwrite of the opencart system modules is required.

****** For custom opencart templates/themes this module might need some adjustments.