Freemius - weDocs Permalinks

functions.php

<?php
/**
 * Customize docs permalinks parsing.
 *
 * @author Vova Feldman
 */
function freemius_docs_permastruct_rewrite() {

	if ( post_type_exists( 'docs' ) ) {
		// Modify root slug to "help" instead of docs.
		global $wp_post_types;
		/**
		 * @var WP_Post_Type $docs
		 */
		$docs = $wp_post_types['docs'];
		$docs->remove_rewrite_rules();
		$docs->rewrite['slug'] = 'help';
		$docs->add_rewrite_rules();

		add_post_type_support( 'docs', 'excerpt' );
		add_post_type_support( 'docs', 'author' );
		add_post_type_support( 'docs', 'page-attributes' );
		add_post_type_support( 'docs', 'custom-fields' );
	}
}

add_action( 'init', 'freemius_docs_permastruct_rewrite' );
?>