Hello Adam,
I tried commenting out the code to create an "empty" download function (in the browse_Document.asp page) but I still see the same behavior. I highlight some text, click on "downloadable files" button, after waiting several minutes I get a blank pop-up window that says in the title bar " - - Web Dialog " I have also noticed that the icon does not appear, even in the editor here. I have the same issues with trying to use the feature here also.