Please find the release notes attached and download locations below.

Download Location:

URL: https://ftp1.accessdata.com/login

Username: accessdata-edisco
Password: bu9rgwFxiVR2
Folder: /v5.3.1/SP8

This can also be accessed via FTP using the same credentials above but using the FTP URL below:

URL: ftps://ftp1.accessdata.com
Note: Windows currently does not provide native SFTP functionality (Unix and OS X, however, do). To connect to a SFTP site on a Windows operating system you will need to use a client capable of SFTP like WinSCP or FileZilla. 
 
 
For the list of fixes, please see the eDiscovery 5.3.1 SP8 RN.pdf file attached to this article.
 
Feel free to post below with questions or comments. If you have support issues please submit a ticket above to generate a request.