Article ID: 2863532 - View products that this article applies to.
After you upgrade to Windows 8.1 Preview, you cannot view your library data in the Kindle Windows Store app.
This issue occurs because Internet Explorer looks for the library data by using parameters that are specific to Windows 8. Therefore, Internet Explorer cannot find the stored data in Windows 8.1 Preview.
To resolve this issue, install update 2863532 from Windows Update
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, about the performance or reliability of these products.
(http://support.microsoft.com/kb/824684/ )Description of the standard terminology that is used to describe Microsoft software updates