Dont download! Updated
Update: all of a sudden it started working. Dont think it was anything I did - perhaps it needed time to realise Im a subscriber.
I did, yesterday, and now I have no issues in my library and no way to download them even though I have a paid-up subscription through Macworld.
I advise you to wait until they fix the bugs.
Kate the Tatter about
Macworld Digital Magazine U.S., v6.0