Milonic JavaScript Menu

I found that I have to ad the rows
"
<script language="javascript" type="text/javascript">
if(ns4)_d.write("<scr"+"ipt language=JavaScript src=mmenuns4.js><\/scr"+"ipt>");
else _d.write("<scr"+"ipt language=JavaScript src=mmenudom.js><\/scr"+"ipt>");
</script>
"
to my html-page.
After that v5.19 ...

If uppgrading from v5.00 to v5.19, do I have to install everything on more time or can I simply replace some of the files ??

Hi.
anyone how know the easeist way to upgrade from v3.4.07
to the latest version ? Do I have to replace everything or...????