Thanks for keeping me updated about this, @MAG-M.
It's good to hear that you're now up and running. Let me provide some more details about restoring a company file in QuickBooks Desktop.
If you wish to open a backup that doesn't overwrite your existing data, all you have to do is to restore the backup and save it on your desktop. Additionally, if you encounter any issues while restoring the backup copy, you may refer to the articles below for some troubleshooting steps:
This should get you moving today.
Feel free to reach back out to me if you have any other questions concerning QuickBooks. I'll be happy to lend a hand. Wishing you and your business continued success!