Good morning, @dwit. It's good to see you here in the Community and thank you for all the information you provided in your post! I'm happy to help you sync with QuickBooks Desktop.

That error you're getting means the web connector add-on is still installed within QuickBooks Time. The first thing we'll want to do is uninstall the add-on. Here's how to do this: 

1. Log in to QuickBooks Time. 
2. Go to Feature Add-Ons on the left menu. 
3. Choose to Manage Add-Ons. 
4. Uninstall the QuickBooks Desktop Integration. 

Next, you'll go to your QuickBooks Desktop account and try to run the sync. After the error, you'll need to use the option to "Activate QB Time" from your Desktop account to set it back up. Follow the steps below:

1. In QuickBooks Desktop, go to the Employees menu up top. 
2. Click on Enter Time. 
3. Select the Activate QB Time option. 

Lastly, you'll enter in your QB Time login information, and then it'll sync. Please feel free to reply to this post if you have any questions or encounter any errors. I'm eager to get this working for you!