GG, I had a look at that key myself, while looking for possible resolutions to this issue. (Got the pointer from Kellys-korner.) The particular key is not present in my own installation, which seems a bit weird. Don't know what it means. But the point is, apparently its non-presence doesn't affect the ability to download/save files.
Agreed, but it's presence with the wrong setting might well do, so it's worth checking.