Does this course include downloads for offline viewing?

Why can't I download the videos? I've bought 20 other courses from Proko and this is the only one I've not been able to download... A lot of Proko videos are 1 gigabyte each and my mobile internet allowance is only 6 gigabytes per month. I'm lucky enough to have unlimited access at home (many people do not), but I'm not actually home that much. I download the videos to an external HDD and watch them when I have free time while on the road.