Add this code into function.php of your child theme.

Please make all changes to the child theme files, and do not add the code directly to the theme files, otherwise after updating the theme your fixes will be lost


// Add Groovy Menu integration function.
add_action( 'presscore_body_top', 'gm_child_show_menu', 1 );

if ( ! function_exists( 'gm_child_show_menu' ) ) {
	function gm_child_show_menu() {
		if ( function_exists( 'groovy_menu' ) ) {

			// Remove default header menus.
			add_filter( 'presscore_show_header', '__return_false' );

Note: You can find the child theme for the The7 Theme in the Groovy Menu > Integration section