I created a .cfg-file (e.g. "KSP-0.25-fixes.cfg") and added it to the WarpPlugin folder (although you could also put it directly into GameData afaik). This should integrate all the fixes of the last few pages: @PART[AntimatterReactor*] { @TechRequired = advScienceTech @MODULE[FNAntimatterReactor] { @upgradeTechReq = experimentalScience } } @PART[AntimatterTank*] { @TechRequired = advScienceTech } @PART[FNFissionFusionCatReactor] { @TechRequired = specializedElectrics @MODULE[InterstellarCatalysedFissionFusion] { @upgradeTechReq = experimentalElectrics } } @PART[FusionReactor250,FusionReactor375] { @TechRequired = metaMaterials @MODULE[InterstellarTokamakFusionReator] { @upgradeTechReq = nanolathing } } +PART[FusionReactor250] { //@name = placeholder_fusion_upgrade @name = placeholder.fusion.upgrade @TechRequired = nanolathing @category = -1 @title = Tokamak Upgrade } @PART[NuclearReactor*,FNPFissionReactor*] { @MODULE[InterstellarFissionMSRGC,InterstellarFissionPBDP] { @upgradeTechReq = metaMaterials } } @PART[FusionReactor0625,FusionReactor125] { @techRequired = specializedElectrics @MODULE[InterstellarInertialConfinementReactor] { @upgradeTechReq = experimentalElectrics } } @PART[*MPD] { @MODULE[ElectricEngineControllerFX] { @upgradeTechReq = experimentalScience } } @PART[ThermalTurbojet*] { @MODULE[FNNozzleController] { @upgradeTechReq = hypersonicFlight } } @PART[KSPIMagneticNozzle1]:Final { @node_stack_top = 0.0, 0.401, 0.0, 0.0, 1.0, 0.0, 1 @node_stack_bottom = 0.0, -0.21, 0.0, 0.0, 1.0, 0.0, 1 } @PART[KSPIMagneticNozzle2]:Final { @node_stack_top = 0.0, 0.80, 0.0, 0.0, 1.0, 0.0, 2 @node_stack_bottom = 0.0, -0.50, 0.0, 0.0, 1.0, 0.0, 2 } @PART[KSPIMagneticNozzle3]:Final { @node_stack_top = 0.0, 1.205, 0.0, 0.0, 1.0, 0.0, 2 @node_stack_bottom = 0.0, -0.75, 0.0, 0.0, 1.0, 0.0, 2 } Also delete the TreeLoader folder from GameData. I agree, there should be at least some warning in the initial post, maybe with a link to the workarounds suggested here.