Hi Wolfgang,

> Hm
>
> Hmmmmmmmmm
>
> Hmmmmmmmmmmmmmmmmmm
>
> Lets say, I have a program version 5.0.
>
> Now I publish this program as version 5.1.
>
> For existing installations, I want to provide an "update-installer", which
> lifts the existing installed version 5.0 to version 5.1. This
> "update-installer" does not contain any table, which is individual to the
> user, like licence, but also that daily work stuff (Bewegungsdaten,
> whatever this is translated into english).
>
> They all have to have the same GUID?

Yes, that is correct! In this case, 5.0 and 5.1 have the *same* Product
GUID.

Friedrich