I've recently signed up for a free trial of DPS 2015 and I'm in the process of going through the how to videos. I'm at the stage where I need to install the HTML Article Packager. I've downloaded the install files and when I've double clicked to install, the icon appears bouncing in my dock like any program loading ( see pic 1 ) and then I get this prompt ( see pic 2 ) I click open but then the bouncing icon dissappears and nothing happens. I've dragged the programme directly into my applications folder and tried loading it from there but got the same problem. I can't think of any other way to install it. Any ideas on how to solve this problem would be greatly appreciated.