Aah, that explains. Now I can load the scatter, thanks!
Now, for my understanding, I continue the steps as described on the XDA forum using this scatter from the binaries (sorry, misunderstanding of definitions from my side…).
If this is successfull, I can try to update with z3ntu’s Android Kitkat 4.4.4 version as described here: Android KitKat (4.4.4) for FP1