Updating and uninstall registration

When I'm updating an application that I've installed with Setup Factory to a new version, what's the right way to get the "Uninstall" in Windows registered for the new version with the old version removed. As I'm doing it now, my update goes in, applies replacing files as needed, but the result is I have two entries in the Uninstall list, one for the previous and one for the current version.

#THISHASTOBEEASYRIGHT?

Thanks.

Greg