my current version of LilyPond is 2.8.1-1. I've found a new minor
upgrade. When I tried to install it, the installer said it found
previous version of LilyPond and said a had had to uninstall it first.
Why is it bothering me with it and just doesn't ask: "Previous version
of LilyPond found. It is necessary to uninstall it before proceeding. Do
you want to uninstall the previous LilyPond version?" (Yes/Cancel)?