I understand they're offering a two-for-one special right now.
Seriously though, as a workaround if you right click on the button and tell it to open the link in a new tab, you can close the new tab without switching to it, usually before it finishes loading. Sometimes it takes a couple of right-clicks on the Download button before the option to actually download the file comes up but it shouldn't take more than maybe three tries. There are also add-ons that automatically open anything on a different site in a new tab which would allow you to do your standard left click but offhand I don't recall the names of any of them.