If you have the old data in place, simply use the built-in File > Open or File > Import. This being the simplest way to load the data into the software. For the same versions of the product, data loading should be the same without errors, but if they actually appear, then use the Help section of the product, because additional modules might have to be installed on your PC before the data can be added into the application.
To ask for additional support, access the contact form: https://www.mbpros.com/contact-us.html