Just deleted the old version and updated; I can get as far as attempting to actually start a new game and then I get an error.
Short version:
Fatal: Fighter Wing spec with id [expsp_fascine_Fighter_wingt not found
Long version:
Spoiler
767095 [Thread-3] INFO exerelin.campaign.DiplomacyManager - Selected faction is star_federation | star_federation
3767095 [Thread-3] INFO exerelin.campaign.DiplomacyManager - Faction nex_derelict marked as non-randomizable
3767095 [Thread-3] INFO exerelin.campaign.DiplomacyManager - Faction mess marked as non-randomizable
3767095 [Thread-3] INFO exerelin.campaign.DiplomacyManager - Faction derelict marked as non-randomizable
3767096 [Thread-3] INFO exerelin.campaign.DiplomacyManager - Faction omicron_faction marked as non-randomizable
3767096 [Thread-3] INFO exerelin.campaign.DiplomacyManager - Faction omega marked as non-randomizable
3767096 [Thread-3] INFO exerelin.campaign.DiplomacyManager - Faction scavengers marked as non-randomizable
3767096 [Thread-3] INFO exerelin.campaign.DiplomacyManager - Faction mess_remnant marked as non-randomizable
3767096 [Thread-3] INFO exerelin.campaign.DiplomacyManager - Faction luddic_path is pirates, and pirate relations randomization is disabled
3767096 [Thread-3] INFO exerelin.campaign.DiplomacyManager - Faction vantanet marked as non-randomizable
3767096 [Thread-3] INFO exerelin.campaign.DiplomacyManager - Faction pirates is pirates, and pirate relations randomization is disabled
3767096 [Thread-3] INFO exerelin.campaign.DiplomacyManager - Faction remnant marked as non-randomizable
3767096 [Thread-3] INFO exerelin.campaign.DiplomacyManager - Faction independent marked as non-randomizable
3767096 [Thread-3] INFO exerelin.campaign.DiplomacyManager - Faction domres marked as non-randomizable
3767096 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Legio Infernalis as 0.0
3767096 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with player as 1.0
3767096 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Reparations Society as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Shadowyards as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Diable Avionics as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Derelict as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Mess as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with United Pamed as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with mercenary as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Federation as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Hegemony as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Derelict as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Omicron as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Scy Nation as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Spindle Protectorate as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with H.M.I. as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Roider Union as 0.0
3767097 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Sierra as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with sleeper as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Magellan as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Neutral as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Omega as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with scavengers as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with No Such Org as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Machina Void Services as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Mess as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Fang Society as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Luddic Path as -0.65
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Leveller as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Knights of Eva as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Abyssal Horror as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Vanta as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Great Houses as 0.0
3767098 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with pirates as -0.65
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Remnants as -0.5
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Redwings as 0.0
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Elite Mayasurian Guard as 0.0
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Brighton as 0.0
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Luddic Church as 0.0
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with STDF as 0.0
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Knights of Ludd as 0.0
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Ninth Battlegroup as 0.0
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Mayasura as 0.0
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with plague-bearer as 0.0
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with O.R.A. as 0.0
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Starfarers as 0.0
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Draco Group as 0.0
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with refugees as 0.0
3767099 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with hostile as 0.0
3767100 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Lion's Guard as 0.0
3767100 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with independent as 0.0
3767100 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Persean League as 0.0
3767100 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Domain Resurgent as 0.0
3767100 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Xhan Empire as 0.0
3767100 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Sindrian Diktat as 0.0
3767100 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with STDF as 0.0
3767100 [Thread-3] INFO exerelin.campaign.PlayerFactionStore - Saving independent player relations with Tri-Tachyon as 0.0
3767103 [Thread-3] INFO com.fs.starfarer.api.impl.campaign.intel.FactionCommissionIntel - Accepted commission with [Federation]
3767103 [Thread-3] INFO exerelin.world.ExerelinNewGameSetup - Finished sector generation
3767617 [Thread-3] INFO data.scripts.campaign.loa_spawnRandomMarketsPlugin - Successfully added the market spawner script; our headquarters is [Anargaia]
3767700 [Thread-3] INFO exerelin.plugins.ExerelinModPlugin - New game
3767876 [Thread-3] INFO scripts.world.systems.Roider_Kiska - creating Vector2f[-24800.0, -13900.0]
3767885 [Thread-3] INFO scripts.world.systems.Roider_Kiska - finalizing Vector2f[-24800.0, -13900.0]
3768023 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading JSON from [data/config/exerelin/miningConfig.json]
3768048 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\HMI_brighton]
3768049 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\HMI]
3768050 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\Magellan Protectorate]
3768050 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\Mayasuran Navy]
3768051 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\Nexerelin]
3768051 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\Roider Union]
3768052 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\tahlan-shipworks]
3768052 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\Vayra's Ship Pack]
3768053 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\XhanEmpire]
3768058 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\HMI_brighton]
3768059 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\HMI]
3768059 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\Magellan Protectorate]
3768060 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\Nexerelin]
3768061 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\Roider Union]
3768061 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\SEEKER_UC]
3768062 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\tahlan-shipworks]
3768062 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\Vayra's Ship Pack]
3768063 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\XhanEmpire]
3768066 [Thread-3] INFO com.fs.starfarer.loading.LoadingUtils - Loading CSV data from [DIRECTORY: C:\Program Files (x86)\Fractal Softworks\Starsector\starsector-core\..\mods\Nexerelin]
3768089 [Thread-3] ERROR data.scripts.util.MagicCampaign - DEPRECATION WARNING!
3768089 [Thread-3] ERROR data.scripts.util.MagicCampaign - DEPRECATION WARNING!
3768089 [Thread-3] ERROR data.scripts.util.MagicCampaign -
3768089 [Thread-3] ERROR data.scripts.util.MagicCampaign - OBSOLETE DECLARATION OF MagicCampaign.createCaptain()
3768089 [Thread-3] ERROR data.scripts.util.MagicCampaign -
3768089 [Thread-3] ERROR data.scripts.util.MagicCampaign - DEPRECATION WARNING!
3768089 [Thread-3] ERROR data.scripts.util.MagicCampaign - DEPRECATION WARNING!
3768114 [Thread-7] INFO sound.oo0O - Cleaning up music with id [miscallenous_main_menu.ogg]
3768394 [Thread-3] ERROR com.fs.starfarer.combat.CombatMain - java.lang.RuntimeException: Fighter wing spec with id [expsp_fascine_Fighter_wingt not found
java.lang.RuntimeException: Fighter wing spec with id [expsp_fascine_Fighter_wingt not found
at com.fs.starfarer.loading.specs.HullVariantSpec.computeWeaponOPCost(Unknown Source)
at com.fs.starfarer.loading.specs.HullVariantSpec.computeOPCost(Unknown Source)
at com.fs.starfarer.campaign.fleet.FleetMember.getMemberStrength(Unknown Source)
at com.fs.starfarer.api.util.Misc.getMemberStrength(Misc.java:4217)
at com.fs.starfarer.campaign.fleet.FleetData.updateFleetPointsUsed(Unknown Source)
at com.fs.starfarer.campaign.fleet.FleetData.syncIfNeeded(Unknown Source)
at com.fs.starfarer.campaign.fleet.FleetData.sort(Unknown Source)
at com.fs.starfarer.campaign.fleet.FleetData.sort(Unknown Source)
at com.fs.starfarer.api.impl.campaign.fleets.FleetFactoryV3.createFleet(FleetFactoryV3.java:462)
at data.scripts.util.MagicCampaign.createFleet(MagicCampaign.java:627)
at data.scripts.world.systems.SKR_plagueA.generate(SKR_plagueA.java:241)
at data.scripts.world.SKR_plagueGen.generate(SKR_plagueGen.java:28)
at data.scripts.SKR_modPlugin.onNewGame(SKR_modPlugin.java:93)
at com.fs.starfarer.campaign.save.CampaignGameManager.o00000(Unknown Source)
at com.fs.starfarer.title.TitleScreenState.dialogDismissed(Unknown Source)
at com.fs.starfarer.ui.Oo0O.dismiss(Unknown Source)
at com.fs.starfarer.ui.impl.o0oO.dismiss(Unknown Source)
at com.fs.starfarer.campaign.save.J.actionPerformed(Unknown Source)
at com.fs.starfarer.ui.newnew.buttonPressed(Unknown Source)
at com.fs.starfarer.ui.I.Ò00000(Unknown Source)
at com.fs.starfarer.ui.I.processInput(Unknown Source)
at com.fs.starfarer.ui.Stringsuper.super(Unknown Source)
at com.fs.starfarer.BaseGameState.traverse(Unknown Source)
at com.fs.state.AppDriver.begin(Unknown Source)
at com.fs.starfarer.combat.CombatMain.main(Unknown Source)
at com.fs.starfarer.StarfarerLauncher.o00000(Unknown Source)
at com.fs.starfarer.StarfarerLauncher$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
3768571 [Thread-9] INFO sound.oo0O - Creating streaming player for music with id [miscallenous_main_menu.ogg]
3768571 [Thread-9] INFO sound.OooO - Playing music with id [miscallenous_main_menu.ogg]
Have you tried deleting your MagicLib and ESPMVS folders entirely & downloading the latest versions?
That's not it. Noting the references to MagicLib in the logs, I checked my version, but it's up to date. I also tried deleting it and doing a fresh download, but nothing changed; the error persists.