Hi Cafe Rogusta ,

Since it looks like you are using Sage 50 US, I am going to move this post to that Support Group so that other users of this software will see it and can offer you their thoughts and insight.

Related to your issue however, please see the article "Default printer keeps changing" with steps: 

1. Exit Sage 50—U.S. Edition
2. Click Windows Start button.
3. Click Settings.
4. Click Devices.
5. Click Printers & Scanners.
6. Scroll down past the list of printers and devices.
7. Change Let Windows manage my default printer to Off.
8. Right-click the appropriate printer and select Set as default printer.
9. Verify the default setting does not change when printing to another printer.

Thanks,

Erzsi