While this may not have much to do with this individual issue (or again, it may) I would like to recommend to people that they not use direct download links unless they are on a page clearly marked as an instant download page.
These downloads, in my experience and from the player feedback I receive, cause a lot of people to be startled and panic thinking something is invading their computer. I have heard of all kinds of ways to abort such downloads because people don’t want to get a virus or spyware. The most popular is pulling the plug on their computer, possibly resulting in further issues. 
You can bet this visitor will not be back. So be very, very careful how you present direct downloads. Make sure everyone is totally prepared for what happens when they click and the download starts on the spot.
Of course, promoting one software while the download brings another doesn’t help.