When you downloaded purchased theme zip file there you should see several folders and files. If you downloaded files from ThemeForest you will get a zip file like this: themeforest-10581527-mobilz-responsive-multipurpose-theme.zip; if you downloaded files from Ninzio Themes you will get the file like this: mobilz_theme1.zip. It is the same file just different naming. Open that file and there you will see a list of files and folders, go to demos folder and there you will find a file all.xml with all demo files included in it, options.txt for theme options and widgets.wie for widgets. Demos include:
 
  • Pages
  • Slider
  • Navigation
  • Posts
  • Products
  • Projects
  • Widgets
  • Theme options