CTDs with 747 and 737

Hi there,after a long time i started flightsimulator up these days. I did a fresh install of my pmdg a/c's as i had installed FS some weeks ago but didn't find time to continue then.All i took from the backup was the liveries with the aircraft configs.Loading the 737-700 from cold-and-dark (saved flight shipped with the plane) works fine and i can then switch to some other models and some liveries - others crash the flightsim. Using the working models with a working livery i already did some flights and that works fine.Loading the 747 with the saved flight shipped with the plane doesn't even work. It worked once, then when switching on the battery it crashes again.NOTE: I already read the thread about CTDs and the stickshaker problem. I again installed the 747 afterwards using the newly downloaded file - nothing changed.Does anyone have any ideas what's up there?btw: no other plane is causing any trouble - everything is working well with other planes - only both of PMDG.Hoping for some help...