You add back elements in Visual Composer by commenting out the element’s line in file includes/core/codeless_elements.php.
Example: Find this line: vc_remove_element("vc_single_image");
Edit to this: //vc_remove_element("vc_single_image"); to bring back the single image element.
and this line: vc_remove_element("vc_cta");
To this: //vc_remove_element("vc_cta");
For the Call To Action element.
