In order to remove or edit "Not a Registered User?" Button you need to go to:


TOOLBOX >> FORM MANAGER >> Find: "Listing - Account Login"




In order to view the code, click and hold the arrow head symbol to open up the text box:




These are the buttons that appear on the form:




If you want to remove the first button "Not a Registered User?" you need to remove this section:




This is how the code appears once removed:




This is how your page is going to look:



If you want to center the button, add a "col-md-12" instead of a "col-md-6":




This is how your page is going to look: