To update the Google XML Sitemap V 1.13 to V 1.14:

1 - Upload the included "google_xml_sitemap_seo_install.php"
to the root of your shop and then run it like this:

https://YOUR DOMAIN NAME/google_xml_sitemap_seo_install.php

If will recognize existing installations. Click the load with 
delete option.

2 - Upload the following files:

googlesitemap/index.php
googlesitemap/sitemap.class.php

