I would ask the same thing you do if something would stop working after an update. Let's check to see why you're having some challenges after the update.
Chances are the update was interrupted, or some program files were not loading properly during the update. So, what you can do is update the software again or reinstall it. Then, please let me know how these steps work for you.
Thank you for letting me know the results upon uninstalling and reinstalling the software, @ Q-B Online User 1.
Currently, we have an open investigation about the multi-tab issues you are experiencing with the QuickBooks Online Desktop App. We have escalated this unexpected behavior, and our engineers are continuously working to implement a fix.
For now, we're unable to provide you an estimated turn around time when the investigation will be closed. I'd suggest giving us a call so and provide the investigation number INV-50172, so we can add you to the list of affected users. We'll let you know via email or by tagging you here as soon as the issue is resolved.
Go to the Help menu in the upper-right hand corner.
Click Contact Us.
Provide the INV number in the description column, then click Let's talk.
Select between Start Messaging or Get a callback.
As a workaround, let's resetting and relaunching your app. This will ensure the application is compatible with your setup and will help avoid problems when using it.
Here' how to reset your app:
Go to Help.
Select Reset App Data.
We've also reduced our support hours to 6 A.M. - 6 P.M. PT Monday - Friday and some products will only have chat support due to COVID-19. Rest assured, we'll resume our normal hours as soon we get through with this situation.
In case you need tips and related articles in the future about the "How Do I" steps in QuickBooks Online, visit our QuickBooks Community help website for reference: QuickBooks Help Articles.
I appreciate your patience. Leave a comment below if you have any other concerns. I'm always around to help.