OK, just to clairy. I am using SID's and STARs.
The reason why I ask if FSX should't be updated is "Radar Contact". As I understand it, Radar Contact has it one internal database, build from the information in FSX. Thus if I use a flight plan tool with updated information, should Radar Contact also be updated with updated information from FSX.
I undestand that PFPX has a learning curve, but I accept this. PMDG 737 had a learning curve compared to the FSX 737, but now I would never dream about using the FSX version of 737 :-)