Thanks, Walf. I could do that, and what you suggest had occurred to me.
It seems odd though because I seem to recall that in the past I have used my ASIair for visual only when using it to control my SkyWatcher AZ-EQ6 mount.
Does the ability to switch off Autocentre depend in which type of mount is being controlled? Or have ZWO decided now to remove the ability of the ASIair to control all mounts for visual only?