Hello Solid Bear,
You can add the application to the Web Connector again using the .qwc file. I'd be glad to walk you through the steps.
- On your Web Connector, click Add Application.
- Browse to the third party application's .qwc file.
- Click the .qwc file and click Open.
The .qwc file will be provided to you by the third-party web application's provider. This file must be downloaded to your computer. Please contact your third-party provider for assistance.
Your file location is in C:\Users\Public\AppData\local\IntuitQuickBooks Web Connector\version directory.
You might also want to check out this article for your reference: Get help with common Web Connector errors.
If you have other concerns, please don't hesitate to post. We're here for you.