Sometimes this does not work straight.
Whenever you try to download a ZIP-File from this page, you may receive an error.
The workaround is: Right-Mouse-Click over the link and "Open In New Window".
You may now see a "Forbidden" Message in that new window.
Now refresh this page until you see crap appear, starting with PK.
Now Right-Mouse-Click over the link and "Save As" should work as expected.