Hello Alex,
Thanks for the response.
At first I was running the update from within Nero. Because this didn't work I used the executable.
It first deinstalled everything but did not start the update (I didn't use the compatibility), then I started the executable again by hand and it updated nero to the most recent version. It works but not automated.
I didn't try the compatibility mode on the executable, it might work but I don't deinstall :-)
Regards,
Tonko