Pip
Thanks for advice. I did disinstall again and wiped out every remaining file, reinstalled and, presto, there was the language button on top right of screen.

Have a nice day!

I downloaded the English version but keep getting the German one when running it. Maybe this has to do with the fact that I earlier purchased (by mistake) the German CD, although I disinstalled the latter? I'm on Windows 7. Is there a way to switch languages?