I'm using a Hotas Warthog throttle. After re-installing my 737 NGX for P3D in P3D v3.1, my throttle starts reverse thrust when pushing the lever forward. Pushing further will solve the problem, but the throttle-handles show strange behaviour in my VC  as well, no smooth movement. 

I do not have this problem with the PMDG 777 or any other standard aircraft. 

Calibrating the throttle didn't solve the problem. I have a registered version of FSUIPC as well. Should I delete the trhrottle-assigment from within the control-function of P3D? Or should I delete it from FSUIPC? Or should I try re-installing the plane all over?

 

I'm using Windows 10 64 bits

 

 

Or should I delete it from FSUIPC?

 

This.

 

Assign only in the sim. Calibrate in FSUIPC if you need to.

 

 

 

Or should I try re-installing the plane all over?

 

This rarely solves anything, and can cause more issues than you're attempting to solve.

 

 

 

Full names in the forum, too, please - first and last. Although I'm assuming your actual name is your username, for consistency (and to be sure), the name needs to be in the body of each post.