I've tried changing the key that activates it, as well as uninstalling Categorized Favorites Menu and starting up without SKSE (then reinstalling as well). Nothing makes any kind of menu come up.
Here's my mod list:
Spoiler
00 Skyrim.esm01 Update.esm02 Dawnguard.esm03 3rdEraWeaponsMoS.esm04 SkyMoMod.esm05 Lanterns Of Skyrim - All In One - Main.esm06 Night Eye Overhaul.esm07 ApachiiHair.esm08 HighResTexturePack01.esp09 HighResTexturePack02.esp0A ShadowStripingFix.esp0B StaggerFix.esp0C Unofficial Skyrim Patch.esp [Version 1.1]0D Unofficial Dawnguard Patch.esp [Version 1.0]0E HighResTexturePackFix.esp0F DawnguardDrainVitalityFix.esp10 ShowRaceMenuOptions.esp11 MintyLightningMod.esp12 RevampedExteriorFog.esp13 StaticMeshImprovementMod.esp14 Ars Metallica.esp [Version 1.0.2]15 BellyachesNewDragonSpecies.esp16 Convenient Horses.esp17 Ish's Souls to Perks.esp18 Lanterns Of Skyrim - All In One - Default.esp19 UnlimitedBookshelves.esp1A navetsea female face preset.esp1B SaveHotKey.esp1C SkyMoMod_lists.esp1D Tamriel Compendium - Skill Books.esp [Version 1.1]1E xgfPferdeKarren-en.esp [Version 1.6.2]1F Chesko_LoreBasedLoadingScreens.esp20 DYNAVISION Dynamic Depth of Field.esp21 IMAGINATOR - Visual Control for Skyrim.esp22 amk Border Lace Lingerie.esp23 Berserk Black Swordsman Armor - No Arm.esp [Version 1.0]24 BowOfShadows.esp25 Cloaks.esp26 1nivWICCloaksCRAFT.esp [Version 2.0]27 DaggerCraft.esp28 DragonBoneWeaponsComplete.esp29 Dread Knight Weapon Set.esp2A Dwemer Scouter.esp2B Northborn Fur Hoods.esp2C FaalSizaan.esp2D HBetterBows.esp2E SilverArmor.esp2F hothtrooper44_ArmorCompilation.esp30 Insanity's Dragonbane.esp [Version 1.0]31 leathercollar1mm.esp32 NarquelionBow.esp33 Red Bane Redone V1.esp34 Scoiatael Weapons.esp35 TwisterBow.esp36 3rdEraWeapMoS-lvlList.esp37 3rdEraWeaponsMoS-ACE-Patch.esp38 CraftableNightingaleClothSet.esp39 EnchantableBackstab.esp3A DeadlyDragons.esp3B BuildableHouse.esp3C ESFCompanions.esp [Version 0.1]3D Gildergreen Regrown.esp [Version 1.2.1]3E Radiance.esp3F SkyrimSewers.esp [Version 3.10]40 The Paarthurnax Dilemma.esp [Version 1.2]41 armored-horses.esp++ Proper Aiming.esp42 BarenziahQuestMarkers_Droppable.esp43 Better Dynamic Snow.esp++ FSS-Slight pause between lines.esp44 LaFemmeLycana.esp45 No Helmets Required.esp46 NoDeepCaveAmbianceLoops.esp47 NoOverPlayedCaveCrumblingAmbiance.esp48 posesivecorpses.esp49 FunctionalHomes.esp4A dD - Realistic Ragdoll Force - Reduced.esp4B BeastWithin.esp4C Apocalypse - The Spell Package.esp4D ColettesRevenge.esp4E Night Eye Overhaul.esp4F NEO Optional - Tint 5.esp50 NEO Optional - Prolonged Spell.esp51 NEO Optional - Longer Scroll.esp52 NEO Optional - Longer Potions.esp53 Upgrade Leveled Items Spell.esp54 DragonbornAscendant.esp55 DeadlySpellImpacts.esp56 CuralmilsPhial.esp57 Path of Shadows.esp58 EmpoweredMagic.esp59 The Dance of Death.esp5A DeadlyCombat.esp++ DeadlyCombat_NoAttackDistance.esp5B dodge.esp5C Dual Wield Parrying_ScriptDragon.esp5D ACE BYOG.esp5E ACE Archery.esp5F ACE Enchanting.esp60 ACE Melee.esp61 ACE Smithing.esp62 Acquisitive Soul Gems.esp63 LockpickTree.esp64 SpeechTree.esp65 Cazy Hairs-by zzjay.esp66 FallOut3Hairs.esp67 Fh hairs-by zzjay.esp68 numenume Hair.esp69 RANs Hair Ver 2.0.esp6A ksKhajiitWarpaints.esp6B TeraHairWeightFix.esp6C Glowing Eyes.esp6D Improved Eyes Skyrim.esp6E SNVega.esp6F UFO - Ultimate Follower Overhaul.esp70 Ladyfaces.esp71 My Home Is Your Home.esp72 Amanda.esp73 Michelle.esp74 zzz_Jenassa_MAKEOVER_by83Willow.esp75 BFFAnimalCompanions.esp76 Spousetocustomhome.esp77 portal2mod.esp78 Alternate Start - Live Another Life.esp [Version 2.1]79 ThatsRacist.esp7A PTAlchemyFoodOverhaul.esp7B WATER.esp7C Skyrim Performance MOD.esp7D Bashed Patch, 0.esp7E ASIS-Dependency.esp7F ASIS.esp
The only thing I haven't tried is uninstalling the files from other mods that would seem to be entirely unrelated. Are there any files I should look for that I'm not aware of? As far as I'm know there really shouldn't be anything outside of a bad favoritesmenu.swf, and clearly I've tried replacing that.
Also noteworthy is that this happened quite suddenly with no new mods actually installed. I'm going to try validating my files through Steam, although that seems unlikely as well since the game is otherwise running fine.
Edit: Although validating files did replace something (probably the EXE, since it had zero download time), it didn't fix the problem for me.
Edit: Fixed and requesting topic lock.