I am trying to an upgrade an application which was installed with an old certificate that has already expired. The new certificate has a changed subject line. The option to "only install packages with the same certificate as the Update" was also selected.
According to this page I need to sign an update package with the old certificate and inside that package have the "Updater.exe" signed with the new certificate.
The issue I am having is that I am unable to sign an update package with the old certificate as it has already expired. I tried changing the system date and disabling the timestamp URL, but that also fails at install time with an "unknown publisher" error.
Is there any way to upgrade these existing installations automatically?
Thanks
Russell.