On my licenses page, I have one that won't display the correct IP licensed address:
http://prntscr.com/3l9b7f

I have changed the SERVERNAME and edited the httpd.conf file and still it just shows LOCALHOST.

Have re-started centovacast after my changes.

What am I doing wrong ?

V3 licenses are no longer restricted to a certain domain name, so the domain you're now seeing in your account page does not update when changing servers/ips/domains anymore. It will remain simply a label for your license