With the Pro version you can import the fields, but this will not solve your problem. Since the theme is built using ACF there’s going to be a lot of code in the theme for displaying the site based of the values of these fields. This is not something that any other theme will be able to do this automatically and will need to be customized to do so. No “off the self” theme will be able to display the content and fields that were specifically designed for this site. You will either need to completely redesign and rebuild the site to only use what WP offers or you will need to build a new custom theme to continue to use the fields that were created.
