Fsx Ksea Scenery Problem

Hello everyone,

I wasn't sure weather to post in the scenery or mesh section.  A long time ago, I installed some addon scenery for KSEA to add the new runway.  However, just recently, the grass around the taxiways disappeared.  Now only the fsx city texture surrounds the airport.  The artificial plateau is still there.  I removed the addon scenery and naturally the third runway disappeared, however the texture still remained.  How do I fix this?

Thanks in advance,

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