How do I fix the upgrade logic of a wix setup after changing InstallScope to “perMachine”

Question

We use wix to create setups for our application. For the case where the user has already installed an older version of our application, we do a major upgrade with the MajorU

Answer 1

Sadly, the Windows Installer doesn't support that. Some process outside your package (a bootstrapper/chainer?) will have to manage the upgrade from per-user to per-machine.