When I tried to install a new version of my InfoPath add-in i got the following error message:

• “ Unable to install this application because an application with the same identity is already installed. To install this application, either modify the manifest version for this application or uninstall the preexisting application. “

Now I was sure i raised the version of the add-in + my installation msi removes any previous versions before performing a fresh install. (+ I uninstalled the old app first)

I finally stumbled onto this post which had exactly the same error as me and fixed it with the following run command: rundll32 dfshim CleanOnlineAppCache

So I uninstalled my add-in (again), ran the command, re-installed exactly the same .msi and it worked perfectly.

Gr

Tom