Manual Mode

1. Go to Plugins → Add New
2. Search for One Click Demo Import and install the plugin
3. Activate One Click Demo Import from your Plugins page
4. Once the plugin is activated you will find the actual import page in: Appearance -> Import Demo Data
5. Find the Demo Content folder, which included with the theme package, and choose all right files in the next window. Click Import Demo Data

You now just need to wait for the importer to finish. This might take a few minutes depending on your hosting server speed.