We've updated our Folio Builder and Folio Producer last June 19, 2012 when the new version was released. After the update, the folio we created is not compatible with the app. Then we followed the steps on the link:
"With InDesign CS5/CS5.5, you may need to revert to a previous set of Folio Producer tools to be compatible with an older custom viewer. Uninstall the Folio Producer tools, and then download and install the appropriate version."
After reverting to a previous set of folio producer tools, we also recreated the same folio we were trying to publish and the same problem came up. Any ideas on how to work around this problem?