The DEMO version only includes 4 pages:
http://vitamincfoundation.com
http://vitamincfoundation.com/forum/index_sid-3c84502ec55d019ec663768ffb24e0ae.html
http://vitamincfoundation.com/forum/memberlist_sid-3c84502ec55d019ec663768ffb24e0ae.html
http://vitamincfoundation.com/forum/memberlist_mode-team-sid-3c84502ec55d019ec663768ffb24e0ae.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
Go back to the index page