5. If you would like to revert to the last public release software, place the GUPDATE_570.GCD file in the \GARMIN folder. Rename GUPDATE_570.GCD to GUPDATE.GCD before disconnecting your device. NOTE: If you revert to an older version of software, all of your settings will be reset to defaults.
Is this a mistake, should it be revert to 5.60, or a new 5.70?
Last stable release update is 5.60.