Hello Dino,
No, I cannot engage STOVL mode either. That is to say: the doors open but the exhaust keeps pointing backwards, as is also shown in the MFD, and the word 'hover' is red, even if I do not select hover but STOVL mode. Even after having dumped nearly all fuel I still cannot get into STOVL mode. And, as I said, I cannot change the fuel and payload in the P3D menu, not even with the engine turned off. When I change values and press OK the old values remain.
I think I installed correctly (as administrator). Is there something I could do wrong there?
You mention conflicting software. What software is known to conflict? I do not think I have any unusual software in use, but one never knows.
Thanks fior your help. Perhaps is helps to note that I installed the Tacpac edition of the MilViz F-86F and there one of the pup-up windows (shf 2; aircraft configuration) appears as a black box, so without content. Does this perhaps point to a common problem with a Tacpac aircraft installed in v3.1 without Tacpac, and could this have something to do with the F-35B problem?