It did the job…… thank you Darkman! Damn… I was giving up on retraining myself again after 2 years (today!).
The next beer is on me!
EDIT: BUT… there is another situation. Download to Cougar was ok. I fired up Falcon, went to the settings and got everything ready to go. But… after loading the dunc_dx key file in Falcon… all my buttons are not correctly recognized. I thought it has something to do with Emulation… but nothing shows the correct pressed button.
EDIT 2: Sorted the devices within a Textfile. Now it works!