Trouble restoring any backup on 450G

From digging, I see now that it is recommended to use export/import for working with backups. However, I need to restore a backup , or at least be able to read it to get the config info for a new box. I had a 450G box die. I have several backups, but get the following error when attempting to restore to the exact same unit (new) via Winbox: “Couldn’t restore configuration-Incorrect file size (6)”. Is there a specific cause for this, like firmware version, etc??

Backup is only for the exact same piece of hardware. You must use export.

I think you can load your backup file into your mikrotik.com account and see the configuration though.

I would be fine with that. I am poking around on the mikrotik.com site, trying to figure how I can load the config for reading, but not finding it.

Any pointers??