1.2 Access Manager vs Echo Knowledge Base
Access Manager is an independent plugin used to restrict access to KB content. It can be purchased here.
The Access Manager plugin contains all the functionality of the Echo Knowledge Base for Documents and FAQs:
Access Manager plugin = Knowledge Base for Documents and FAQs features + access control
It is important to remove Echo Knowledge Base for Documents and FAQs plugin when using Access Manager plugin. See installation instructions for details.
Note that Access Manager does not have WPML support.