To upload Hex Files, download this files first : https://sourceforge.net/projects/arduinodev/files/ArduinoBuilder/FreematicsArduinoBuilder-1.0.12-win32.exe/download Complete vMix Controller files : DOWNLOAD vMIX Controller 8 Input Why .hex? not .ino? so you can uploaded it without need to set the Arduino IDE library (or else). Simple… Just Download & Upload to Arduino Pro Micro… The Tally Lights doesn’t need External … Continue reading DOWNLOAD – vMix Controller 8 Input