Thank you so much for using our theme and your interest for the premium version. If you want to save the settings and files, you can use the following three method for it,
1. Download the XML file via Tools > Export and export the file.
2. Download Customizer data via https://wordpress.org/plugins/customizer-export-import/ and export the data.
3. Download Widget data via https://wordpress.org/plugins/widget-importer-exporter/
Hope this will help to import the files and settings. In addition, you can use the same method for import the data on next site as well.