You can now download the free sample icons without having to use iTunes File Sharing.
Click the ICONS button (1) on the main toolbar.
If you have not downloaded any icons or created any custom icons, a alert appears (2) prompting you to download a set of free sample icons. An internet connection is required if you wish to use this option.
Once the download is completed, a list of icon categories appear (1) from which you can select an icon.
Note also that you can tap the DOWNLOAD button (2) to restore or update the sample free icons.