The downloaded version keeps disconnecting why? I have unistalled and reinstalled, but this very annoying problem persists

Hello, jjenniferl!

Thank you for sharing your concern in the Community. I'll make to get your account up and running again.

Let's check if your computer meets the system requirements for QuickBooks Online app. 
If everything works, we can start clearing the cache in your QuickBooks app to refresh the connection.

Here's how:

1. Log in to your QuickBooks Online app account.
2. Click Help.
3. Choose Reset App Data.​​​​​​​

If you're using QBO desktop app, please see this article to clear cookies: Clear cache and cookies

You can also check this article for the installation steps: QuickBooks app for Windows and Mac: General support

Please let me know if you have other concerns. I'm just around to help.