Best way to reinstall FS9?

OK so apparently I have messed up a few things. My texture in Northern Canada and Alaska has lakes higher than the ground and the navigation lights on the aircraft are blinking way too fast.
I have a lot of payware aircraft I dont want to lose, but Im sure I can log into my accounts on each payware site, to redownload them, so I might just do that and completely wipe FS9 and reinstall, but that to me sounds like an extreme measure. is there somethign easier?
EDIT I cant spell today
I have a lot of payware aircraft I dont want to lose, but Im sure I can log into my accounts on each payware site, to redownload them, so I might just do that and completely wipe FS9 and reinstall, but that to me sounds like an extreme measure. is there somethign easier?

EDIT I cant spell today