you can add this script at the advanced tab on the home page to re-activate it.  not used for now.

<script type="text/javascript">
/* script */        
(function() {
    function async_load(){

    var caname = ""; //Enter the name of lead if your CRM can share it.    Make sure to put between quotes.
    var camessage = "Greetings! Thanks for visiting our website. What can we help you with?"; //Enter message lead will receive.
    var caalertem = ""; //Enter emails of agents to notify of chat transcripts.    

        var s = document.createElement('script');

        s.type = 'text/javascript';
        s.async = true;
        s.src = ''+caname+'&alertem='+caalertem+'&message='+escape(camessage);
        var x = document.getElementsByTagName('script')[0];
        x.parentNode.insertBefore(s, x);
    if (window.attachEvent)
        window.attachEvent('onload', async_load);
        window.addEventListener('load', async_load, false);