Extract the contents from the archive file you downloaded to a folder on your harddisk.
The application can be launched using the startup files in the bin sub-directory of the installation folder. On Windows based systems, you can use the file named combatassistant.bat. You can launch this file by either double clicking it or calling it from the command line (cmd.exe).
On Unix bases systems, you can use the file combatassistant.sh.