Collect a screwdriver, USB cable, and a Windows computer with HQ installed. Power on the ST-33Q+. Connect the USB cable to your computer, open HQ, select Updates, select Update Software for Device, select the ST-33Q+, and click update. Use a screwdriver to remove the plate covering the USB connector. Connect the USB cable to your ST-33Q+. Click next to start copying the update. When the software is copied successfully, click next to continue. Disconnect the USB cable from your ST-33Q+. Remove all power sources, including any batteries located in the internal compartments. Reconnect the power source to the ST-33Q+. Power on the ST-33Q+. Connect the USB cable to your ST-33Q+ Check to ensure update was completed successfully.