Thank you for responding, I will try my best to list accurately. My GameData folder contains: ASET(Incl Aset Avionics and Props), Atmospheric Sound Enhancements, B9 PartSwitch, Community Category Kit and Resource Pack, Firespitter(Of course), JSI, KAS, KASA, KAX, Kerbal Engineer, KIS, MagicSmokeIndustries, MechJeb2, NearFutureElectricaNTRs, NearFuturePropulsion, NearFutureSpacecraft, NTRsUseLF, OPT, PlanetaryBaseInc, PlanetShine, SpaceY-Lifters, Squad, SurfaceLights, TweakScale, WarpShip and WheelSounds.
I most recently installed an update of NearFuturePropulsion, but one quirk, it does keep asking me to add the latest one and gives a download link, but it is the same one I have already installed 0.6.4. I have removed this, but the original fault remains, so I have reinstalled it....one quirk of this is that it asks for the 0.6.4 version twice.
I'm worried I may have to start from scratch.
Any advice would be welcomed.