Hello, 

I got the point and see how important to transfer files from the older version to the latest one without using the other QuickBooks version. If the gap of the version is too long, we're unable to jump and make it once. It's advisable to use a version that is closer to your old one. This helps you ensure to transfer the file successfully. 

You may consider searching for some websites that offer free transferring data to the latest version. 

Let us know if you have other concerns with QuickBooks. Stay safe.