A member of our team, did a number of "ODBC Queries" on their laptop and the result was a .PBIX = now we are trying to "merge" these on a differnt team members laptop? However, each time we "open a single PBIX" it opens a new instance of Power BI Desktop?
I'm not sure but you want to use the same pbix file for all of your member (team) ?
I make some supposistion
1 - You can deploy the pbxi file in the cloud like onedrive for business and each member of you're can work with it.
2- You want to merge some odbc queries in the same data model with powerbi desktop and it's possible with the "merge queries" functionality. It's in the queries editor.
It sounds like the issue is with the ODBC queries being split between multiple .PBIX files?
The best way to get all of the queries into the same PBIX file is to open the queries in the query editor, and copy the advanced editor code of each one into a master PBIX file.