I got the exe (which is a big one) in two locations...
C:\ProgramData\Spoon\CachedApplications\Default
and
C:\Users\All Users\Spoon\CachedApplications\Default

Exact same size and date.

Bug?

Also can't do an /unregister after this:
An error occurred while processing the command: Virtual application does not exist

But it is there (in two locations.....) ...