FS9 flight planner problem

I need some help with my FS9 flight planner. I can make a flight plan as always and the route will be displayed on the GPS and in the map view but doesn't show on the map on the flight planner so it's not possible to edit the route because you can't see it.
I've got a lot of stuff on this copy FS9 and don't want to reinstall because I'd lose too much.
Somehow the fligtht planner has gotten corrupted to the point that the flight route won't show.
How do I "un-corrupt" it without losing all my other FS9 files?
Thanks,
I've got a lot of stuff on this copy FS9 and don't want to reinstall because I'd lose too much.
Somehow the fligtht planner has gotten corrupted to the point that the flight route won't show.
How do I "un-corrupt" it without losing all my other FS9 files?
Thanks,