Thank you for getting back to us, @Kb21Krash.

I can see that you've already performed the recommended troubleshooting steps to isolate the issue. Since you still encounter the same result, I suggest run your QuickBooks Desktop in administrator mode. To do so, just right-click the QuickBooks Desktop icon and select Run as Administrator.  

If this shows the same result, you can suppress QBDT. This will help you determine a company file damage.

Here's how:

1. Press and hold the Ctrl key, then double-click the QBDT icon.  Don’t let go of CTRL until you see the "No Company Open" window.
2. Choose a company file, and then select Open.

If this does not work, follow the steps of Solutions 3 to 5 in this article: QuickBooks Desktop doesn't start or won't open. 

If the issue persists, I highly suggest reaching out to our technical support team again. This way, they can further investigate what causes the issue and share additional steps to fix it for you. 

Here's a great source where you can find articles that can help you in managing your books in QuickBooks, please visit our QBDT help articles page. This includes topics such as reconciliation, track income, and expenses, run reports, etc.

Should you need anything else, don't hesitate to comment below. I'm always around to help if you have other QuickBooks-related concerns. Stay safe and take care always.