This is crazy but I can’t uninstall a program

I am trying to install a Counterspy and I continually get a message that instead of installing it is upgrading. Then I get a message that the setup routine can not uninstall the older version. I have done a complete search for the app using the apps name and the developers name in both the registry and on the hard drive and can’t find it. How do I find this thing and get rid of it so I can install the current version???