Retry Garmin cure.
Before doing anything Drag&Drop the rgn file you want to flash to your device ( kunix's cure) in Updater.exe and it will open in your desktop, after that put your nuvi in pre-boot.
Post please (without id) NV backup restore log error message4) I have NV backup, so i tried to restore it - result - boot screen with "system software missing" and error in log file.
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