My client needs to use the First Data Payment Gateway, not Simplify Commerce which comes with the Royal theme. I installed the First Data plugin, but it is not showing up under the “Checkout” tab in the Woocommerce Setting section. Only Simplify Commerce is showing up. When I tried to manually remove Simplify Commerce, I could not click on the Check Out tab anymore? Why is that the new payment gateway that i installed is not showing up?