Fairing is missing from tech tree & VAB

[OldLost 27]

KSP: 1.4.3 (Win64) - Unity: 2017.1.3p1 - OS: Windows 10  (10.0.0) 64bit

Problem: In career mode, Part AE-FF3 Airstream Protective Shell (3.75m) is missing from tech tree and VAB/SPH. I have completed the tech tree; all nodes are unlocked. The part is not present in the VAB in Sandbox mode either, but craft with the part can be loaded and launched. Any idea where the problem comes from? Any easy fix for putting it back? TIA

Mods installed (via CKAN, and up-to-date):

000_AT_Utils - 1.6
ClickThroughBlocker - 0.1.6.5
Toolbar - 1.7.17.11
ToolbarControl - 0.1.6.9
AllYAllContinued - 0.11.14.4
Antenna Helper - 1.0.4
Astrogator - 0.7.8
B9 Part Switch - 2.3.1
Color Coded Canisters - 2.0.1
Community Category Kit - 3.0
Community Resource Pack - 0.10
CommunityTechTree - 3.3.2
CryoEngines - 0.6
CryoTanks - 1.0
DistantObjectEnhancement - 1.9.1
DMagic Orbital Science - 1.3.0.12
DockRotate - 1.4.1.13
DynamicBatteryStorage - 1.3.1
Environmental Visual Enhancements - 1.4.2.2
Extraplanetary Launchpads - 6.0
Firespitter - 7.9
Flexible Docking - 1.0.6
FShangarExtender - 3.5.3.2
FTLDriveContinued - 0.2.1.3
Fuel Tanks Plus - 2.0.2
GroundConstruction - 2.0.1
HideEmptyTechTreeNodes - 1.0.4
Interstellar Fuel Switch - 3.6
Kerbal Attachment System - 0.6.4
Kerbin Environmental Institute - 1.2.9.2
KerbalAtomics - 0.5
Kerbal Engineer Redux - 1.1.5.2
Kerbal Inventory System - No Fun - 0.1.4.1
KerbNet Controller - 1.0.4
Kerbal Inventory System - 1.12.6700.37736
KSP-AVC Plugin - 1.2.0.2
KSPRescuePodFix - 1.3.2.11
Lithobrake Exploration Technologies - 0.4
MechJebForAll - 1.3.0.2
Modular Rocket Systems - 1.13.2
ModularFlightIntegrator - 1.2.5
MunarIndustries Fuel Tank Expansion - 0.9.6.1
NavBallDockingAlignmentIndicatorCE - 1.0.4.2
NavHud - 1.3.5.1
NearFutureConstruction - 1.0.2
NearFutureElectrical - 0.10.1
NearFutureLaunchVehicles - 1.1.5
NearFutureProps - 0.3.3
NearFuturePropulsion - 1.0.1
NearFutureSolar - 0.8.11
NearFutureSpacecraft - 0.7.9
PartWizardContinued - 1.3.7.4
Precise Maneuver - 2.4.1
Procedural Fairings - 1.4.3.4
ScienceAlert - 1.9.3
Science Relay - 1.0.5.1
SpaceY Expanded - 1.4
SpaceY Lifters - 1.17.2
Tracking Station Evolved - 1.0.3
Trajectories - 2.2
Kerbal Alarm Clock - 3.9.1
Alternate Resource Panel - 2.9.3
Transfer Window Planner - 1.6.3
Waypoint Manager - 2.7.2
 

Edited June 18, 2018 by OldLost

[Capt. Hunt 251]

procedural fairings has a script that automatically removes the 2.5 and 3.75 meter fairings and changes the 1.25 meter one to work like their fairings (does not seem to effect the 5 meter MH fairing base).  I know it's rather annoying, since there's some times where the stock fairings are still useful, and it breaks any rocket that uses stock fairings.  To get the stock fairings back, delete PF_Squad_Config.cfg.

[Xd the great 336]

Did you check ckan for updates?

I cant seem to see the real problem here.

Can you make a subassembly of just that part?

[OldLost 27]

Thanks Cap. I'll give that a try. Stand by... 

[OldLost 27]

Following up: Cap's fix worked. Thanks. I never would have figured it out on my own.