zumo 660 (GCD File) software version 4.70

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http://gawisp.com/perry/zumo/zumo660_GCDFile__470.gcd

Changes made from version 4.50 to 4.70:
Improved the speed of TrackBack route calculations.
Fixed an error that caused the device to freeze when importing routes from gpx files.
Fixed an error that caused a missing key on the Arabic keyboard.
Fixed an error that dropped street names with the Czech text language on the map.
BMW Nav IV only: Fixed an error that prevented the page button from working properly on the Fuel setup page.
BMW Nav IV only: Fixed an error that caused the previously active route to deactivate when the vehicle was restarted.