Sometimes due to caching, some thumbnails are not updated when you make changes to your FlipBook.
To refresh the Thumbnails:
Click Options on the menu bar.
Click Refresh Thumbnails and the Confirm dialog box will be displayed.
If you click Yes, the existing thumbnails will be erased and a new set of thumbnails will be re-created. Click No if you do not want to proceed.
To Clear History:
Click Options on the menu bar.
Click Clear History and the Information dialog box will be displayed.
Clicking Yes will delete all the links to previously visited FlipBooks. Click No if you do not want to proceed.