QuickBooks Enterprise data files cannot be opened in QuickBooks Pro or Premier. Also, Enterprise data files cannot be opened in QuickBooks for Mac. The main reason to use QuickBooks Enterprise rather than Pro, Premier, or Mac is the list limits. All versions of Quickbooks other than Enterprise only allow 14,500 names in lists (Customer, Vendor, Items and Employees). If your list size is under these limits, you can safely convert your QuickBooks Enterprise data file to Pro, Premier, or Mac.
To downgrade your Quickbooks Enterprise data file to Pro or Premier, click the link below:
QuickBooks Enterprise Convert to Pro/Premier/QBO