Japan-bought 66i refuses to see software updates

Experienced plenty of bugs during the first hike with my new 66i (resuming expedition mode freezing the device, connecting via USB to Mac freezing the device, Active route dropped after resuming from Expedition mode) and decided to search for software updates.

To my surprise there is an update 6.30, yet Garmin Express, Garmin Connect Web and Garmin WebUpdater all insist that 4.30 is the latest firmware.

Any ideas how to force the thing to update?

Thanks