I’m sorry it has been so difficult for you. By our records we see you bought the subscription two days ago. Since then you haven’t sent us any question or doubt neither in our forum nor in our private ticketing system.
It is true that the existing documentation is for Joomla 2, but the KMFasTrans features in Joomla 2 and Joomla 3 are the same and are basically located in the same places, so the documentation for Joomla 2.5 (which is extensive) is perfectly valid for Joomla 3. And the same applies to the videos.
Creating a multilingual website in Joomla is not easy at first. KMFasTrans is a very useful tool but you have to know the basic principles of a multi-language site in Joomla and our technical support is here to help. We've helped many clients to start their multilingual Joomla website answering questions and making interventions on their websites to solve problems, most of them not related with KMFasTrans but only with native Joomla. We encourage you to request help from our technical support service to overcome the first difficulties you can have with your multilingual web site.