This goes into your functions.php
define('WS_DOWNLOAD_RATE', 'WS_package_11');
/**
* Rename delivery method, despite the Webshipper value
* (Also enables ability to be translated in WordPress/WPML)
*
* @param string $label
* @param WC_Shipping_Rate $rate
* @return string
*/
add_filter('woocommerce_shipping_rate_label', 'my_woocommerce_shipping_rate_label', 10, 2);
function my_woocommerce_shipping_rate_label($label, $rate)
{
if ($rate->id == WS_DOWNLOAD_RATE) {
return __('Only PDF Download', 'your_textdomain');
}
return $label;
}