GD Rating System Pro is still in development. This is the first Release Candidate, and the last version before the stable version of the plugin is released tomorrow. This will include both Pro and Free versions.
GD Rating System Pro 1.0 RC #1 has got new addon for Dynamic Load of rating blocks with use of AJAX. That addon will help with the cache plugins to prevent display of old and outdated rating because of the cached HTML. Many more things are improved and fixed in this version.
Stable 1.0 version will be released tomorrow, and Dev4Press website is in process of preparation for the release. New videos are added to knowledge base and more videos are coming soon.