Not working

ok, the problem is you have two versions of the jQuery library being loaded on your page.
open up the header.php file and comment out :

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>

Another issue is your theme may not be using the standard wp_footer() call. Try changing the script loading location from footer to header in the plugin options page under Dashboard > Settings > Collapse-O-Matic > Script Load Location (or something like that)

Please let us know if you still need help, or if that resolves the issue for you.