Download Cart to Zip now working

This was another item which didn't retain the previous working settings.

I've just tested it again, and it's working.

But remember, adding large numbers of items to you cart could result in an un-downloadable cart. So download the items in your cart frequently, and keep the number of items to a reasonable number. Do NOT add entire albums to your cart unless the number of items is less than 50 or so items.