Restore to a MT router with USB and access via https://mikrotik.com/product/woobm ???
Restore to CHR virtual router ?
Restore to MT router with serial console ?
“Safe mode” is a nice feature to avoid this kind of accidents.
For future use, automatically produce a new (current) .rsc file on a regular basis. I have a script that produces the binary .backup and a plain text .rsc files and sends them to me via E-Mail. That scrip is run via the scheduler every night.
Now before anyone bitches that using E-Mail may not be secure, my mail server is in the same cabinet as the router and on the same LAN at my house. I’m not overly worried about it…