Yongnuo YN-622N-TX i-TTL Wireless Flash Controller 1. When you prepare to upgrade YN-622N-TX first time, please download the driver and software package YN_Trigger_Updater.zip, uncompress it and run YN_Trigger_Updater_Setup.exe to install the driver/software. 2. Download the most update firmware package and unzip it. 3. Turn off YN-622N-TX, keep pressing mode button and turn on it again. The screen will show firmware upgrade interface . Connect the device to your PC via a USB cable. 4. Run YN_Trigger_Updater from start menu. Click on "Browse..." Button and navigate to the firmware you download in step 2. Wait a few seconds until the device is detected. Click on "Update" to begin. When is done, YN-622N-TX will be reset automatically and you can use the new version now. 5. If any error is encountered when updating, please turn off and try again from step 3.