Please note that LiveZilla is not a cloudbased service.
LiveZilla will run autonomously on your own webserver and it is necessary to upload a bunch of files via FTP to your server (step 1).
Afterwards you will need to create and configure your LiveZilla Server (step 2). Once you did that, you can integrate LiveZilla into your website (step 3).
Don't worry, it's dead simple.
Better safe than sorry ...
» Use a separate MySQL user Account and a secure password (> 10 chars, alphanumeric).
» Use a separate Web-User and make sure that the LiveZilla Web-User has only file permissions within the LiveZilla folder.
» Always use strong passwords (> 10 chars, alphanumeric).
» Use only HTTPS/SSL for all connections.
» Change the username of the LiveZilla Administrator (don't use administrator, admin, root ...) and don't use the administrator account for external chats.
» Backup your data regularly.
» Never use outdated versions of LiveZilla, apply all updates as soon as they are released.