Download the latest release of cMonex from sourceforge. At the moment this is a zip file containing the publish files as created using Visual Studio Express.
Unpack the zip file to a temporary folder and then start the 'setup.exe' program. This will create a program entry within Start->Programes->Viralburn->cMonex.
Click the cMonex icon to start the application.
Use the windows uninstaller under System Settings->Software->cMonex