Okay so after doing some reverse engineering of the plugin, I believe the issue lays in the Coderocks_Woo_Delivery.php file:
if(is_plugin_active('woo-delivery/coderockz-woo-delivery.php')) {
I believe should be modified to check for pro folder as well which is:
if(is_plugin_active('coderockz-woocommerce-delivery-date-time-pro/coderockz-woo-delivery.php')) {