Not really. The point is not to be able to modify existing shortcuts, but be able to assign shortcuts to anything and in all combinations. There's a million things that can't have shortcuts at all and situations, where you can't use modifier keys with a specific otehr key because it already is hard-locked to anotehr function.... You're German, you should know about all that insanity and awkwardness with ä,ö,ü, backslasches, square brackets and so on or even AltGr not functioning as normal Alt....
Yes I'm aware of this but I didn't assume the author was part of the minority of german users who prefer the english UI I have given up setting inpoints with the keyboard long ago.
As for quickly changing some shortcuts this tool is quite nice since it creates a backup of the old settings.