Thank you for giving that a try, T S11.

I want to make sure you're able to switch the company file in your QuickBooks Desktop account.

Since the troubleshooting steps mentioned above didn't do the trick, I recommend reaching out to a member of the QuickBooks Desktop Support Team. Agents have specialized tools, like the ability to share your screen, to take a more in depth look at what could be causing this issue. Here's how to get in touch with the team:

1. Go to Help, then select QuickBooks Desktop Help/Contact Us.
2. Select Contact Us.
3. Give a brief description of your issue, then select Continue.
4. Sign in to your Intuit account and select Continue and then Continue with my account.
5. We'll email you a single use code. Enter your code and select Continue.
6. Select to chat with us or Have us call you.

The following article provides this info if you ever need it again in the future: Contact QuickBooks Desktop Support

If you need additional assistance please don't hesitate to reach back out. I'll be here to help in any way that I can.