Thank you for the offer and it could be what you've described or something else.

That said all I care about is fixing it.

When I come across them I'm uninstalling and reinstalling the product which seems to fix it.

There's not really a lot to show just a lot of orphaned references and when I uninstall the product in DIM I get a message saying that one or more of the folders are non-existent. That's it. 

Thanks for offering to try and work it out...