Let me help you restore the backup from two days ago to your QuickBooks Desktop 2018 version, @DavidA12122.
Before we start, may I know what version of QuickBooks Desktop where you get the backup file from 2 days ago? If the backup came from a newer version like 2019, 2020, 2021, and 2022, you won't be able to restore your company file in your QuickBooks Desktop 2018 version after you upgrade it.
However, if you created the backup file from the QuickBooks Desktop 2018 version, I suggest following the solutions covered in this article: Error: -6000,-77 when opening a company file.
I'm adding these articles to get more overviews about restoring your company backup file and how to upgrade a backup file that came from later QuickBooks versions:
Additionally, you may want to read more information about why QuickBooks Desktop 2018, 2019, and later versions are no longer supported: QuickBooks Desktop service discontinuation policy and upgrade information.
Please let me know if you have additional questions or concerns about restoring a company file in QuickBooks. I'll be looking at this thread to assist you more. Keep safe and more power to your business!
