Hi Suresh,
WFA 3.0 came out somewhat recently and is available for download on the NetApp support site.
Typically, I've had best luck standing up an entirely new instance of WFA (or even on a new Windows server) for new versions to avoid data loss, custom workflows or commands, categories, etc. Always make sure you have a backup of the current WFA installer as well as backups of the WFA database and any custom commands/workflows before making any version changes.
Also, this is something you might want to work with your NetApp engineers on to avoid any negative impact in your WFA or production environment.