Hi,this is my problem: I erase the old FSX. cfgI start FSX and I create a new FSX. cfg After loading PMDG J41, I start the engines, and I compile the flight plan (FMC works fine) But when use another airplane (for example PMDG 747) my FSX. cfg changes, of course, and if i still use J41 the FMC does not work. The J41 FMC works only with a clean FSX.cfg!!!!!!!!!Really frustratingLuigi