I went a step back from my goals and installed a fresh NWDR image and did step by step the instructions, also keep the "old" kernel. So far as I can say and the programs I can test: FLrig, Fldigi, Wsjt, Js8call and Claws are running. So with this I#m quite happy.
Next I want to install PAT and Headless Pi so I'll report about the results - on the other hand if somebody has hints for this, this would be very wellcome.
73 de Erwin