The DEMO version only includes 4 pages:
http://cesun.edu.mx
http://cesun.edu.mx/course/index_categoryid-199.html
http://cesun.edu.mx/course/index_categoryid-202.html
http://cesun.edu.mx/course/index_categoryid-95.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit http://www7.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
Go back to the index page