To install the application run the file AudioConverter4dotsSetup.exe.
Press the "Next" button in the first screen.
Afterwards, select the directory where the application will be installed, or simply accept the default one and press the "Next" button.
After the application is installed you can start it by clicking the Audio Converter 4dots shortcut icon on the desktop or by selecting the Audio Converter 4dots shortcut from the Windows start menu.