All you need is to upload the new version over the old one. Do not delete the previous version.

There’s an “Split Image” button, when you unroll pages of your book, on the “Manage books and pages” page of plugin.
Note: There’s no “Split Image” button, if you use images from WPmedia gallery or NextGen gallery.

To assign images from WPmedia or NextGen you need to select:

• Manage books and pages, then click “Add Page”.
• Above the “New Page” page you’ll see
  PageFlip Images | Assign from WP Media | Assign from NextGEN Gallery
• Choose `”Assign from NextGEN Gallery” or “Assign from WP Media” and then select image from you want to assign to that page.

Please, remember, that FlippingBook plugin will use images from NextGen or WPmedia, so the image still store in the NextGen or WPmedia and it’s only appear on the FlippingBook page. If you’ll delete or modify image in the NextGen it’s delete or modify in you FlippingBook.

It’s possible when you are using SWF files for pages. Download the simple example and modify it according to your design. Example.

We have one: How to create and post first Flipping Book?

Here is a nice article at wordpress.org “How to change chmod using an FTP client”.

You can upload and use jpg and swf image types.

To add the flipping book add this code on the text area.

[book id='1' /]

Where the number 1 refers to the ID number of your book. To display a different book, simply replace the number 1 with the appropriate ID number of the book you wish to use. “Save” the page.
That’s it, you’re about done. The FlippingBook will be on the new page you created.

If you need to upload many photos (your page will contain 50-100-500 pages and more):

• Name images according to the numbers of pages they will be located on
• Upload photos to the site, by FTP
• Then import photos using the option “Import from FTP”
• Create a book using these images
• Sort the book pages by file names

Often you have to make a book whose size would exceed the width of your blog.
For example, your blog is 900 pixels wide, while you would like to make you’re your book 1,200 pixels wide.
In that case you can use the pop-up function. When user click a link your Flipping Book will open in pop-up window

You can make text, book page or any image a link to your book using next code:
[book id=’your book ID’ popup=’1′ text=’link text’ /] - pop-up text link to your book
[book id=’your book ID’ popup=’1′ preview=’some image URL’ /] - pop-up image link to your book

Use Flipping Book widget to embed pages of your book into the sidebar.
Upon clicking on the image the visitor will go to your book or the book will open on a new page.
You can specify the numbers of pages you would like to be displayed on the sidebar, as well as the resolution of the image displayed.

You can upload small and large variants of the images separately.
The small ones – to be displayed when the book is being paged.
The large ones – when the book is zoomed in.

In that case the small photos will download first, and only as the page is being zoomed in the large versions will load.