I recently installed trial Webuzo on VPS and quite happy using it.
One confusing thing i found which is easily reproducing even in your end-user online demo page. Here are the steps:
1. follow http://demo.webuzo.com/enduser/ (or any installed webuzo instance)
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Virtualizor - The Next Generation VPS Panel
Webuzo - It is Softaculous Standalone for Enterprises, SMB, Developers. Deploy it on Dedicated Servers, VPS, Virtual Appliances or the Cloud
Pinguzo - Server and Domain Monitoring tool
PopularFX - Marketplace of WordPress, Drupal, Joomla, Bootstrap themes
Remote Installer - Use Softaculous over FTP/FTPS/SFTP