Glad to have you here, martha62.
Allow me to share what I know about reverting your Enterprise company file into Pro.
Quickbooks Desktop Pro and Premier can't open a QuickBooks Enterprise company file or read its data. Since the database structure has expanded to accommodate the additional features of QuickBooks Desktop Enterprise, it makes the company file unrecognizable.
What you can do is create a new company file and export or import lists. You may check out this article for the detailed information: Revert a QuickBooks Desktop Enterprise company file to QuickBooks Desktop Pro or Premier.
Feel free to reach out to me if there's anything else you need. I'll be here to keep helping. Enjoy your day!