Without the original encryption key, this is nearly impossible for a .backup file.
To open or "repack" a MikroTik .backup file, you need to understand that these are designed for full system restores on identical hardware. They are not human-readable text and cannot be edited with standard text editors like Notepad. How to "Open" and View Backup Contents open mikrotik backup file repack
There is no official tool from MikroTik to unpack, edit, and repack a Without the original encryption key, this is nearly