Perhaps you could email me the file with the link and I could see what happens with it when I try to open it on my system? I just don't understand why when you type edit>preferences>attachments you are not seeing a list of files. For example, my list is 9 files long, including such as xlsx, odt, JPEG. etc. The "Action" part of that page gives me many options as to each type of file (save, open, etc).
Let me know on this page if you do email something to me so I can make sure my spam filters don't delete it.