Follow the below steps to install an update:
Step 1: Installation files should be located on a USB flash drive.
Step 2: Turn the Kiosk mode off.
Step 3: Insert the USB flash drive into a USB port located next to RJ45 (figures 6 and 7).
Step 4: The inserted USB drive can be visible in the Android menu at the top of the screen (scroll down).
Step 5: Click on file with an ‘.apk’ extension and select Install in the popup window.