Hi,I have downloaded a French airport but there was a big problem : there are two runways instead of one. The old runway is remaining. The author may have missed an "Exclude" line. He sent me an *.apt to erase the old runway but he didn't tell me where to put this file. I've put this file in the file Annemassescenery with the two other *.bgl file. Why does the old runway remain although the author sent me a new file ? Where do I have to put the *.apt file ?Thank You,Best Regards,

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The *.apt file is the Airport for Windows source file. You would have to download and install Airport for Windows http://www.airportforwindows.com/ to modify and recompile the file.