only showing 5 links

You could make them appear more than 5 links?

the solution;

enters the plugin folder and open the archvio link-exchange-shortcode-list.php

and replace the following lines:

$args = array (
		'post_type' => 'link_exchange',
		'post_status' => 'publish'
	);

why

$args = array (
		'post_type' => 'link_exchange',
		'post_status' => 'publish',
		'posts_per_page' => '20'
	);

greeting!