Thanks for replies. I'm not sure what I'm doing wrong, but this what I get in the update.log:
nüvi blade Series Software Version 4.50, UID: xxxxx, HWID: xxxxx
------------------------------------------------------------------------------
Parsing "rrgn,41,1:/41_backup.bin"
Success
Parsing "reboot "
Error: invalid command 'reboot '
Error
However, I still get the 41_backup.bin file, which is about 6 MB so I assume I have a proper backup.
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