The new "auto update" for v.3.2.0 is welcome, but (on a PC) it forces installation to Drive C: which is a pain as I have my previous installations on another drive.

Do I now have to migrate SD to C: or is there an option somewhere to install to the existing folder or a drive of choice?

It didn't make it easy for people to automatically upgrade. And yes, you wouldn't believe the number of calls we get from people who find it a difficult process to master.