help needed

I have been using Cross DJ 1.71 on my PC, on saturday it refused to open and nothing i do has opened the file.
I have now uninstalled and re installed, it shows up as being downloaded, i can open the properties list but the programme will not launch.
I can get my original 5.4 version to open and download, but want version 1.71 back
any ideas?
I have now uninstalled and re installed, it shows up as being downloaded, i can open the properties list but the programme will not launch.
I can get my original 5.4 version to open and download, but want version 1.71 back
any ideas?