Is2014 Downloaded File Association Missing?

Using Windows Vista with SP2, I downloaded the IS file as directed, then saw the plain white file symbol next to the file name (bitdefender_isecurity). When I attempted to open it, I got the windows "Choose a file association" screen, and of course nothing worked. I deleted the file and re-downloaded it, then once more, using my phone as a Internet source to eliminate the possibility of my server somehow messing with the file. No change.

I used the BD uninstall tool to remove my recently expired IS'11 version and repeated the whole process. No change.

Any help in getting this installed would be greatly appreciated.