I still can download from Soundcloud. I'm using the new interface ("Next SoundCloud," I think). Under the files, I see [heart], [chasing arrows], Add to Set, Share, and Download [downward pointing arrow with a line under it].
It seems to be a mix of whether files are allowed to be downloaded or not. Most of the Casio PX-350 examples are, but a bunch of the newer lessons aren't. I bet it was an oversight when they uploaded this month's files. Hopefully, they'll go back in there and change the setting.