Hello Pete, 
Thanks for your reply, again. 
I am familiar with the links you provided, actually I wrote one of them myself. There are a lot of posts on the internet about this subject, unfortunately no solutions until now. 
Concerning 4.746, of course you are right. Most probably a sudden case of dyslexia lite. 
I use the CH yoke and deleted all assignments in FSX. Checked and rechecked and they are not there. 
In FSUIPC the program assigned the top left lever to Joy #0 Z axis. Chose "Throttles" and "Send direct to FSUIPC calibration". 
Joystick calibration: page 1, Throttle (direct) Min -16380 Max 16380 
Before writing this reply I checked the above. Before starting FSX I also checked the Citation.ini file: 
LeftFadec=1 
RightFadec=1 
Throttles=1 
FSUIPC=1 
So everything should be okay. Started FSX, loaded the plane, released the throttles from their detent and there they jumped to the cruise detent. I could move them forward and back but never lower than the cruise detent. 
Now comes the new and exciting part: while doing this I rechecked the Citation.ini and found LeftFadec=2 and RightFadec=2 
I closed FSX and wanted to be sure so I had a look at the ini file again: LeftFadec=1 RightFadec=1 
This last information is new to me and maybe helpful ? I hope you now have all information needed for a sound judgement 
Regards, 
Ronald