Critical distinction: In the Garmin ecosystem, often refers to the boot block / system software version, while 6953 is the application software build . Do not confuse this with aviation navigation databases (e.g., NavData cycle 2404).
Historically, this device used "Garmin Fresh" (formerly Navigon Fresh) for updates. While this software is largely discontinued, it may still be required for older units if Garmin Express fails. 3. Step-by-Step Update Process
about this (e.g., on Reddit, Garmin Forums):
If your device is not on this version, here is how to update it:

