编辑文件

if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly.
}

if ( ! class_exists( 'Astra_Pro_Upgrade_Link_Configs' ) ) {

/**
	 * Register Button Customizer Configurations.
	 */
	class Astra_Pro_Upgrade_Link_Configs extends Astra_Customizer_Config_Base {
		/**
		 * Register Button Customizer Configurations.
		 *
		 * @param Array                $configurations Astra Customizer Configurations.
		 * @param WP_Customize_Manager $wp_customize instance of WP_Customize_Manager.
		 * @since 1.4.3
		 * @return Array Astra Customizer Configurations with updated configurations.
		 */
		public function register_configuration( $configurations, $wp_customize ) {

$_configs = array(
				array(
					'name'             => 'astra-pro',
					'type'             => 'section',
					'ast_type'         => 'astra-pro',
					'title'            => esc_html__( 'More Options Available in Toolkit', 'astra' ),
					'pro_url'          => astra_get_upgrade_url( 'pricing' ),
					'priority'         => 1,
					'section_callback' => 'Astra_Pro_Customizer',
				),

array(
					'name'      => ASTRA_THEME_SETTINGS . '[astra-pro-section-notice]',
					'type'      => 'control',
					'transport' => 'postMessage',
					'control'   => 'ast-hidden',
					'section'   => 'astra-pro',
					'priority'  => 0,
				),

);

return array_merge( $configurations, $_configs );
		}
	}
}

new Astra_Pro_Upgrade_Link_Configs();

编辑文件：class-astra-pro-upgrade-link-configs.php