First you click the [Start] button of Windows, then click "Automated Composing System (ACS)" from [Automated Composing & Ringtones] in the [Program] group and ACS will start.  

You can start ACS by dragging and dropping a MIDI file onto the desktop icon of ACS. In this case, ACS will start with [Convert Mode].

When you start the program, the main interface of ACS will be displayed on the screen. We recommend that you set up MIDI device by clicking the [Setup] button at the first time of starting ACS.