How to Force Unlock

For versions before 6.0, enter in CLI:

set navextraarming_safety=OFF

Then click 'save'.

For versions after 6.0, move the stick to the bottom right and check the SETUP screen on the right side to ensure all items are checked. You need to flip the unlock switch simultaneously; otherwise, if you release the stick, unlocking will not be possible.

Alternatively, flip the unlock switch ten times in succession.