Web connector tries to open a second company file, and aborts.

There are a few technical factors that can lead to QuickBooks automatically terminating or shutting down, Thom Stow-TowMate.

These include corrupted QuickBooks data files, conflicts with other software, virus or malware infections, and issues with add-ons or integrations.

Just in case you haven't tried it yet, you can use the QuickBooks Tool Hub. It's a utility program to help diagnose and resolve various issues when using the software. 

Here's an article as a guide: Fix Common Problems And Errors With The QuickBooks Desktop Tool Hub.

You also mentioned already reaching out to the Fishbowl, ShipRush, and QuickBooks support teams about this problem. However, I would still suggest contacting our technical support team again. They can review the case notes from your previous calls and explore additional options to resolve the issue.

Here's how to reach out to them:

1. Go to the Help menu and select QuickBooks Desktop Help/.
2. Click Contact Us at the bottom of the screen.
3. Give a brief description of your issue, then select Continue.
4. Sign in to your Intuit account select Continue and then Continue with my account.
5. We'll email you a single-use code. Enter your code and select Continue. If you have more than one account, select the account you want to use, and then click Continue.
6. Choose between Chat or Callback.

Let me also share these articles for additional resources when using QuickBooks with other apps:

• Fix Common Web Connector Errors In QuickBooks Desktop
• Fix Issues When QuickBooks Has Stopped Working

Please feel free to reach out if you have any other questions when shipping out your products and using QuickBooks for your business. We're committed to helping our customers get back on track.