First, I did not know that my “review” was going into the support forum, else I would have included information appropriate for support.
My environment is WordPress 3.9.1 running under PHP 5.5 on a Windows Server 2008 R2/IIS 7.x platform.
I have installed the plugin on two different web sites and gotten the same result.
1. I create the first and only flipbook, adding a gallery of two jpg images.
2. I save the flipbook.
3. I click the button in the editor to view the flipbook.
4. WordPress gives me a page saying “Ooops, this is embarrassing . . . page cannot be found.”
5. I get the same result if I enter the hyperlink/address of the flipbook provided by the editor.
Why might this be happening in two independent tests?