This document provides step-by-step instructions for safely upgrading the firmware on a Korg CX3 V2 synthesizer to the latest version 2.01. It recommends using a USB to MIDI interface to connect the CX3 to a computer running Windows XP or 7 to run the firmware update application. The process takes about 10-15 minutes and adds new features while raising the value of the CX3. Cautions are given to follow the steps carefully and to enable necessary MIDI settings on the CX3 beforehand.