WP Categories and Posts

I am attempting to modify my Archives page. However, I am stuck.

I basically want to use the WP Categories and Posts plugin to list each my categories with ALL the posts under that. I am almost there. The page currently looks like this.

The PHP code that drives this in in the Archives.php file. It now looks like this:

<?php
/*
Template Name: Archives
*/
?>

<?php get_header(); ?>

    <?php if (function_exists('ronalfy_list_categories_and_posts')) { ?>
       <div class="posts-list">
       <h1>Archives</h1>
       <?php ronalfy_list_categories_and_posts(); ?>
       </div>
    <?php } ?>

<?php get_footer(); ?>

What do I need to do to modify this so that it displays ALL my posts under each category? Right now it is defaulting to the last 3 posts.