KB Support includes an option for you to restrict access to each KB Article you publish.
If an article is restricted, any user attempting to view the article must be logged in to your website. If they are not, they will only see the article excerpt followed by a notice. The remainder of the content, including comments, will not be visible until the user has successfully logged in.
KBS_ARTICLE_SLUG constant enables you to change the post type slug of the article post type.
By default the slug is article which means that URLs will look like
http://yoursite.com/articles/ for the article archive and
http://yoursite.com/articles/article-name for individual articles but by defining this constant within your theme’s functions.php file, or any custom plugin file, you can update the slug to be anything you want.