Thank you for sharing the steps you've taken in resolving the issue, @Anonymous.

QuickBooks Desktop 2016 is already discontinued and no longer supported . You might want to consider upgrading your QuickBooks Desktop so you can continue running your business processing. 

If you're interested, you may try the 30-day trial of the latest QuickBooks Desktop version. However, before installing the QuickBooks trial version, ensure that the system meets the proper configurations to run the QuickBooks smoothly. Once done, you can now start installing the latest trial version of QuickBooks Mac. Keep in mind that you're unable to recover a company file that is lower than the current edition.

Here's how:

1. Go to this link: Download a trial of QuickBooks Desktop.
2. Click the link for the QuickBooks Desktop edition you'd like to install.
3. Open the QuickBooks.exe file you downloaded.
4. Close all running applications.
5. Double-click the downloaded installer The QuickBooks installation window opens automatically.
6. Drag the QuickBooks icon to the Applications folder. The Applications folder opens automatically.
7. Double-click the QuickBooks icon to open the application.

Check out this article for your reference: Install QuickBooks Desktop. Once done, restore your company file.

Should you prefer to speak to someone over the Phone or Chat, follow the instructions below:

1. Select QuickBooks Desktop Help from the Help menu.
2. Click Contact Us.
   
3. Type in a short description of your concern, then Continue.
4. Choose a way to connect with support.

I'm sure that an agent would be happy to assist you with any questions that you have.

Thanks for reaching out. Don't hesitate to get back to us if you need further assistance in restoring your file. I'll keep an eye out for your response.