The firmware on this unit can is updated using the SynthTool. The latest version of the SynthTool can be found on the link below:
https://www.behringer.com/Categories/ Behringer/Keyboards/Synthesizers-and-Samplers/CRAVE/p/P0DPX/Downloads#googtrans(en|en)
Once connected via USB (We recommend connecting directly to a USB port, not through a hub), the application will automatically detect your unit. Go to the UPDATE tab on the left, and an UPDATE option will appear in the center of the screen if there is an update available. If you are running the latest firmware, you will be informed that your unit is all up to date. The release notes for the firmware will be available to download underneath the UPDATE button.