¡¡ CONGRATULATIONS, jk1895 !!
Finally, ... IT WORKS !!
Why did not work before now ?. Quite simply, because the change Jan asked me to make, was not correct and consequently, the rudder continued to malfunction. As I was asked I modified from "false" to "true", but in the second line of code. Only in Jan's last communication with me, I changed the line (the first one you write, and I did not). I kept thinking it was the same. That was my mistake in replacing false with true. I apologize for this mistake.
<[Bool] [controls_use_rudder] [true]>
<[Bool] [controls_use_rudder_assist] [false]>
When comparing them with the "printed list" I had made, I checked the difference with my list: the "true" of the end of your line (I had "false" = the program had false), was the key that allowed me to suppose that was the solution. I made the change and ... IT WORKED !!.
I was indicated to change in the line that I indicate with the Nº 1 of "false" to "true", when the change was necessary, but in the previous line that I marked with Nº2
I repeat: the first line was the key for me to see it.
Finally, a problem more resolved. Special thanks to you, Jan; I suppose it is very difficult (even being programmer) to know exactly which concrete command of a particular line performs a concrete function. You, from the beginning, have made a continuous effort to solve this problem. My special thanks to your effort.
Also you, Cav. You have also made your contribution, although you intended to assign that function to rudder, which is very logical, since most pilots, so do. But for a long time, I had it assigned to two keys, and I intended to continue.
And finally, you, "jk1895". You, that with your contribution, (these two lines of code, and your conclusive sentence: "Please, do it right !"), have been the cause of my vision where the "false" had to be changed, "true ". Also for your effort, thank you very much.