If the software installation process did not create an automatic desktop shortcut, you can find the program icon in your Applications folder. The Applications folder is a main folder on your Mac and is usually in the sidebar of your Finder window. Otherwise you can search your computer for the program name that you have: Auf geht's!, Weiter geht's!, or Ritmos, and the program icon will appear in your search results.
Be sure not to drag this out of the Applications folder or the software will not be able to find all the files it needs to run! Instead, if you'd like a shortcut, you can anchor the program to your Dock without any trouble.