I've updated Folio Builder and Folio Producer today, also send new version to appstore for approval:
In 2-3 i will have new publication. What will happen if update not yet available? Will users be able to open it or not?
also Content Viever substitutes my app, not goes allong with it as previous version.
As a general rule of thumb, I would advise you never to upgrade your Folio Producer tools until your app update using the latest version has been approved.
Otherwise, if your app is rejected, and you've built your folio with the latest tools you'll have to at minimum rebundle/upload all of your articles with the older toolset.
I believe you can get them here http://www.adobe.com/support/downloads/product.jsp?product=181&platfor m=Macintosh