Force install over old version

posted by  johnb (85)  11 months ago (www.vistax64.com)

I have a program that was installed by Install Shield. It has
disappeared form the Programs list on Add Remove. I tried to reinstall
but I get a message that an Old Version is there and I MUST remove it
from Add Remove Programs :-0
YES a catch 22. I can't remove it because it is not there and yet I
have to remove it to install a new version.

The program writes told me to search for a particular phrase in the
registry and delete all those keys. What a PAIN. I did it but I still
can't install. Obviously something that Installer checks i