WooCommerce - Customizar as opções de tipos de produtos

custom_admin_product_option.php

<?php
function custom_admin_product_option($options){

  $options = array(
              'virtual' => array(
                'id' => '_virtual',
                'wrapper_class' => 'show_if_simple',
                'label' => __( 'Virtual', 'woocommerce' ),
                'description' => __( 'Virtual products are intangible and aren\'t shipped.', 'woocommerce' ),
                'default' => 'yes', //Alterado
              ),
              'downloadable' => array(
                'id' => '_downloadable',
                'wrapper_class' => 'show_if_simple',
                'label' => __( 'Downloadable', 'woocommerce' ),
                'description' => __( 'Downloadable products give access to a file upon purchase.', 'woocommerce' ),
                'default' => 'no',
              )
            );

  return($options);
}
add_filter('product_type_options', 'custom_admin_product_option', 10, 1);