DO NOT TURN OFF POWER DURING THE FLASHING PROCESSIn AEMPro, go to ECU > update EMS firmware

Then you will see this window

Press next twice, then you will select the firmware you want to upload (all firmwares are located here: C:\Program Files\AEM\AEMPro\FIN Files). Press next once, then you will need to select a calibration to the EMS (all base calibrations are located here: C:\Program Files\AEM\AEMPro\Startup Calibrations). It is very important for you to load in a matching version of calibration as the firmware. If you're using v1.19 firmware, then you will need to use a v1.19 calibration.
You must power cycle the car once you've flashed your firmware. Turn the key to the "OFF" position before continuing.