Unplug MIDI cables (if any) from Synesthesia prior to running the update.
Use the latest version (2.3.0) of SymmLab editor to perform the update. UNINSTALL older version.
v2.3.4 - latest version
Download this if you want to update the firmware. The bundled editor software will be of the latest version which ensures compatibility with the firmware.
If you just need the editor software, go to the "Software Only" section to download the installer.
If you just need the firmware, go to the "Firmware Only" section below.