You can export site data this way. You can export site preferences, plugin preferences, theme preferences, and then tables. All tables from DB are listed, not only e107 ones.
- don't export core prefs for theme demo data without checking - sensitive data there
- if you check the option Convert paths, you will override install.xml in your theme folder and all images will be moved there. It would be nice option if you could set at least file name (if not destination)