Ok., now I realized the setup button at the bottom of the Konfiguration window. Now I am able to store my changes in the config file.
But when I load the the german layout (keyb gr), the result is, that I have my Keys for ü,ö,ä, but the Keys “Z” and “Y” are crossed and I have still no “ß”.
When I load the keyb us, the Keys “Z” and “Y” are on the korrect Place of my German Keyboard (where it shoud be crossed) and I have no “ü”,”ä”,”ö”.