I am having a lot of difficulty downloading an SDX file. I am trying to download Visual studio 2012 from a website that offers it free to students (DreamSpark). I have managed to download the installation pack (SDM file). Whenever I download the SDX file it says it needs to know what program should be used to open it. I've tried everything, including Apple QuickTime Player. In its current format, I cannot open it to begin downloading files as the instructions on the website say I should do.
Any help from someone who has come across this before would be appreciated.