Step 1: Download firmware to SD card.
Step 2: Insert SD card to scope.
Step 3: Turn on scope, then long press to return menu.
Step 4: Select the update icon and press to select.
Step 5: Select yes, and wait for an upgrade to complete. You will need to re-sight in your scope after the upgrade. (Note: please make sure the firmware has the right name: Noctis_V1-sw-firmware-r0.0.1.bin )