I know this wasn't an easy process for you, @StillLearning2.

Thanks for the additional details. I've got some info and steps to help ensure you can install your QuickBooks Online (QBO) desktop app.

First, you can restart your computer to refresh the system and ensure no other apps are affecting the installation.

If the same thing happens, I recommend getting in touch with our support team. I know you've already contacted them, however, it would be best to reach out to them again so they can investigate why you're unable to reinstall the app.

Before doing so, please review our support hours to make sure they can assist you right away.

Once ready, here's how to get started:

1. Log in using a supported QBO browser through this link: Login page.
2. Click the Help menu at the top part, and then select the Contact Us button.
3. Type your concern on the search box like "Unable to reinstall the QBO desktop app", and then tap Let's Talk once done.
4. Choose either Message an Agent or Get a Call.
5. Fill out the necessary fields, and then hit Send message or Confirm my Call to continue.
   
   
   

Also, I've added this handy QBO desktop app user guide that contains info about the different keyboard shortcuts you can use, its system requirements, etc. This way, you can maximize the app's features to your advantage: QBO Desktop app User Guide.

I'm a message away if you have more QuickBooks concerns. Take care and stay safe always.