Once you already chosen a template, most likely you would like to personalize and change some of the settings on it.
Screenshot below shows the most requested button that users like you would like to update:
This button, just like any other images can be deleted and be changed to something that you prefer.
Hover your mouse cursor over the button until you see the "Edit" option:
Right click, you will see a menu popping up,
Once deleted, you can now "add an image" of your choice.