I have had Drzewiecki New York airports V1 for about four years. It was installed in FSX on my old computer running Win7 and worked fine.  I recently got a new computer running Win10.  I installed FSX and my USA add on sceneries but when I went to KLGA runway 31 is mostly under water.  I went into slew mode and raised the aircraft to about 25 ft altitude and the runway then appeared.  I am running the same other add-ons including FTX Global OLC N America I had on my old computer.  I have tried KLGA without FTX loaded but no difference.  It only seems to be this runway that is the problem everywhere else on the airport is on dry land.

Does anyone have any ideas how I can permanently raise the runway out of the water please?

Try turning the water effects slider down to the left one notch.

Thanks for the suggestion, unfortunately it did not work - I tried all the water settings down to none.

I just realised I have put this on the Prepar3d forum when it should be FSX. Must get some new glasses.