No Airports in a corridor from Spain to Italy

THis question is a result of waking up to the lousy default scenery in FS9. It seems that in the area I quoted the altitudes are wrong making cities seem flat and airports not there aftter I downloaded some addon mesh and/or Photoreal files for Spain, Malta and Italy. There are no no Airports except Fiuminicino which I added. I tried to add an Addon for El-Prat at Barcelona, but got buildings only with no aprons, taxiways or runways. The cities look flat; in Rome you cannot even see the Vatican.
I can't remeber what Mesh files I downloaded. Is there any way I can correct this situation without having to delete FS9 and start all over again?
I can't remeber what Mesh files I downloaded. Is there any way I can correct this situation without having to delete FS9 and start all over again?