I’m unable to restore my device using a backup that was created from the same CPE. I don’t know why this happens. The backup file itself is human-readable, but after performing the restore, I can no longer communicate with the device. Additionally, I do not have physical access to it.
And to add: textual exports are not really suitable to restore because they add configuration on top of existing one. To apply them as-is, one would have to first remove all configuration, but then one would also loose management access (unless using WinBox via MAC connection) ... before having opportunity to apply the backup.