You can easily download the latest firmware from our global distributor ESI Audio's download page at: https://download.esi-audio.com. Just select "MIDI Controllers" under "product group" and find your product. You'll see all the available firmware downloads and compatibility information. If you're unsure which version of Xkey you have, no worries! Feel free to reach out to us at info@xkeyair.com, and we'll be happy to assist you.