false message = NIS 2014 prevented download from reputable website

attempted to download PokerTracker 4 from their download website.

This is areputable business.

NIS 2014 prevented download which I overrode.

 

Why does this happen?

 

here is a link to photo of desktop error message I received (at photobucket, I dont know how to post the photo)

 

[URL=http://s704.photobucket.com/user/StrikingEagle/media/PT4NortonDownloadmessage1July2014.jpg.html][IMG]http://i704.photobucket.com/albums/ww47/StrikingEagle/PT4NortonDownloadmessage1July2014.jpg[/IMG][/URL]

 

please let me know.  didnt find another solution in searches.  Thanks in advance.