Navigate to https://www.kvitek.com/midisizer/midigal/ using a Web MIDI-compatible browser (such as Chrome, Edge, Firefox, Brave, Opera, or Vivaldi; Safari is not supported). Connect a MIDI cable from your MIDI interface MIDI Out port to your MidiGAL MIDI IN port. Next, select your connected MIDI Out port and MidiGAL firmware variant on the page, then click the Update firmware button. And voilà—the easiest MidiGAL firmware update ever!