Dear David,
Good day! Thanks for posting in Microsoft Community. We are happy to help you.
For your question, you can't change the path of the Excel file or reconnect the form with another Excel file, but you can sync all responses to a new workbook which is stored in the Document library of the site. As you are the form owner, to meet your requirement, you need to move the current form to a group (the same name as the site) in Forms. After that, a new workbook will be created in the Document library of the site, and it should have all responses.
We look forward to your response. Thanks for your cooperation.
Sincerely,
George | Microsoft Community Moderator