The DEMO version only includes 4 pages:
http://mdp.edu.ar
http://mdp.edu.ar/login/index.html
http://mdp.edu.ar/course/index_categoryid-2.html
http://mdp.edu.ar/course/index_categoryid-3.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