How to download demo material?

Hi Marco,

Did you tried to use some download manager?
Eg:
Firefox: https://addons.mozilla.org/en-US/firefox/addon/downthemall/
Chrome: https://chrome.google.com/webstore/detail/chrono-download-manager/mciiogijehkdemklbdcbfkefimifhecn?hl=en

Browser independent (Win; OSX; Linux) https://sourceforge.net/projects/xdman/?source=directory

Please let me know, if you still not able to download.