Agency Pro - Change the default Widget Title HTML tag from <h4> to <h2>

functions.php

add_filter( 'genesis_register_widget_area_defaults', 'agency_pro_change_widget_title_to_h2', 99 );
/**
 * Change the Widget Title HTML tag element from a <h4> to <h2>.
 *
 * @since 1.0.0
 *
 * @param array $defaults  Array of default parameters
 *
 * @return array
 */
function agency_pro_change_widget_title_to_h2( array $defaults ) {
	$defaults['before_title'] = '<h2 class="widget-title widgettitle">';
	$defaults['after_title'] = "</h2>\n";

	return $defaults;
}

Instructions:

1. Open your Agency Pro's functions.php file in an editor
2. Scroll to the very bottom of the file
3. Copy and paste the above code into the file
4. Save.