If the Processbook button takes you to the wrong PI Vision server you may need to check and change your default AF server connection.
The Vision/Coresight URL the Processbook button will use is stored in your default connection PI AF Server.
The Coresight URL parameter is in the Configuration database of the PI AF Server
It can edited to use an updated URL if needed (e.g.replace /Coresight with /PIVision in the URL)
\\AFServerName\Configuration\OSIsoft\PI Coresight\Coresight URL
Thanks Mark. I've made the edit and everything seems to work!