Web Admin Demo Concern

I'm sorry if I am posting my concern in this section. It just that  I don't know where should I post my concern about your web administration demo. I was in your download page looking for online demo on web admin until I saw your web admin demo. So I view the page and it seems that I have to sign up first. I'm confused somewhat. I want to ask why registration is needed if all I'm looking is demo on web admin? Second, does a demo is totally free or has a fee afterwards?