diff --git a/scripts/HP_Compatibility.lua b/scripts/HP_Compatibility.lua
index 943c584..9e1a695 100644
--- a/scripts/HP_Compatibility.lua
+++ b/scripts/HP_Compatibility.lua
@@ -40,7 +40,7 @@ local function modLooksActive(mod)
     if mod.isLoaded ~= nil then return mod.isLoaded == true end
     if mod.isActive ~= nil then return mod.isActive == true end
     if mod.isSelected ~= nil then return mod.isSelected == true end
-    return true
+    return false
 end
 
 local function scanLoadedModTable()
diff --git a/scripts/HP_IntegrationAPI.lua b/scripts/HP_IntegrationAPI.lua
index be49870..75e78f3 100644
--- a/scripts/HP_IntegrationAPI.lua
+++ b/scripts/HP_IntegrationAPI.lua
@@ -15,6 +15,10 @@ local function hpApiPrint(message)
     print(LOG .. tostring(message))
 end
 
+local function isCompatibilityBlocked()
+    return HP_Compatibility ~= nil and HP_Compatibility:isBlocked()
+end
+
 local function normalizeSlot(slot)
     if HP_SlotRegistry ~= nil and HP_SlotRegistry.normalise ~= nil then
         return HP_SlotRegistry:normalise(slot, HP_SlotRegistry.TARGET_COUNT)
@@ -23,6 +27,7 @@ local function normalizeSlot(slot)
 end
 
 local function getProfiles()
+    if isCompatibilityBlocked() then return {} end
     if HelperProfiles == nil or type(HelperProfiles.getProfiles) ~= "function" then return {} end
     local ok, profiles = pcall(HelperProfiles.getProfiles, HelperProfiles)
     return ok and type(profiles) == "table" and profiles or {}
@@ -194,7 +199,8 @@ local function buildApi()
             and HP_RosterExpansion:getStatus() or nil
 
         return {
-            available = true,
+            available = not isCompatibilityBlocked(),
+            disabledReason = isCompatibilityBlocked() and HP_Compatibility:getReason() or nil,
             apiVersion = self.apiVersion,
             modName = self.modName,
             modVersion = self.modVersion,
@@ -256,6 +262,7 @@ local function buildApi()
     end
 
     function api:getSlots()
+        if isCompatibilityBlocked() then return {} end
         local profiles = getProfiles()
         local slots = {}
         for index = 1, getManagedSlotCount(profiles) do
@@ -267,7 +274,21 @@ local function buildApi()
     return api
 end
 
+function HP_IntegrationAPI:unpublish()
+    if g_currentMission ~= nil then
+        if g_currentMission.helperProfilesAPI == self.api then g_currentMission.helperProfilesAPI = nil end
+        if g_currentMission.fs25HelperProfilesAPI == self.api then g_currentMission.fs25HelperProfilesAPI = nil end
+    end
+    if rawget(_G, "FS25_HelperProfiles_API") == self.api then _G.FS25_HelperProfiles_API = nil end
+    if rawget(_G, "FS25_HelperProfilesAPI") == self.api then _G.FS25_HelperProfilesAPI = nil end
+    self.published = false
+end
+
 function HP_IntegrationAPI:publish(reason)
+    if isCompatibilityBlocked() then
+        self:unpublish()
+        return false
+    end
     if g_currentMission == nil then return false end
     self.api = self.api or buildApi()
     self.api.modVersion = self.modVersion
@@ -294,6 +315,10 @@ end
 function HP_IntegrationAPI:loadMap() self:publish("loadMap") end
 
 function HP_IntegrationAPI:update()
+    if isCompatibilityBlocked() then
+        self:unpublish()
+        return
+    end
     if not self.published or g_currentMission == nil
         or g_currentMission.helperProfilesAPI ~= self.api
         or g_currentMission.fs25HelperProfilesAPI ~= self.api then
@@ -302,13 +327,7 @@ function HP_IntegrationAPI:update()
 end
 
 function HP_IntegrationAPI:deleteMap()
-    if g_currentMission ~= nil then
-        if g_currentMission.helperProfilesAPI == self.api then g_currentMission.helperProfilesAPI = nil end
-        if g_currentMission.fs25HelperProfilesAPI == self.api then g_currentMission.fs25HelperProfilesAPI = nil end
-    end
-    if rawget(_G, "FS25_HelperProfiles_API") == self.api then _G.FS25_HelperProfiles_API = nil end
-    if rawget(_G, "FS25_HelperProfilesAPI") == self.api then _G.FS25_HelperProfilesAPI = nil end
-    self.published = false
+    self:unpublish()
 end
 
 addModEventListener(HP_IntegrationAPI)
diff --git a/scripts/HP_UI.lua b/scripts/HP_UI.lua
index 1d297a8..de828a8 100644
--- a/scripts/HP_UI.lua
+++ b/scripts/HP_UI.lua
@@ -604,6 +604,13 @@ end
 -- ===== Render ================================================================
 
 function HP_UI:render(dtMillis)
+    if HP_Compatibility ~= nil and HP_Compatibility:isBlocked() then
+        self.visible = false
+        self.flashText = nil
+        self.flashTime = 0
+        return
+    end
+
     if self.flashTime ~= nil and self.flashTime > 0 then
         local dt = tonumber(dtMillis) or 16
         self.flashTime = math.max(0, self.flashTime - dt * 0.001)
@@ -720,6 +727,11 @@ end
 -- ===== Engine hooks ==========================================================
 
 function HP_UI:loadMap()
+    if HP_Compatibility ~= nil and HP_Compatibility:isBlocked() then
+        self.visible = false
+        return
+    end
+
     if HP_Config ~= nil and HP_Config.read ~= nil and HP_Config.applyToUI ~= nil and HP_Config.init ~= nil then
         HP_Config:init()
         local config = HP_Config:read()
diff --git a/scripts/RegisterPlayerActionEvents.lua b/scripts/RegisterPlayerActionEvents.lua
index 63aaefe..53f04c0 100644
--- a/scripts/RegisterPlayerActionEvents.lua
+++ b/scripts/RegisterPlayerActionEvents.lua
@@ -44,8 +44,13 @@ local function _isHpModifierDown()
         or _isPhysicalKeyPressed("KEY_ralt")
 end
 
+local function _isCompatibilityBlocked()
+    return HP_Compatibility ~= nil and HP_Compatibility:isBlocked()
+end
+
 local function _onCycle(_, actionName, inputValue, callbackState, isAnalog)
     if not _isPress(inputValue, callbackState) then return end
+    if _isCompatibilityBlocked() then return end
 
     -- GIANTS action bindings are not exclusive: KEY_semicolon can still fire
     -- when KEY_shift/KEY_ctrl/KEY_alt + KEY_semicolon is pressed.
@@ -63,6 +68,7 @@ local function _onCycle(_, actionName, inputValue, callbackState, isAnalog)
 end
 
 local function _onToggle(_, actionName, inputValue, callbackState, isAnalog)
+    if _isCompatibilityBlocked() then return end
     if HP_UI and HP_UI.onToggleAction then
         HP_UI:onToggleAction(actionName, inputValue, callbackState, isAnalog)
     end
@@ -70,6 +76,7 @@ end
 
 local function _onMode(_, actionName, inputValue, callbackState, isAnalog)
     if not _isPress(inputValue, callbackState) then return end
+    if _isCompatibilityBlocked() then return end
     if HelperProfiles and HelperProfiles.togglePickMode then
         HelperProfiles:togglePickMode()
     end
@@ -77,6 +84,7 @@ end
 
 local function _onAppearanceMenu(_, actionName, inputValue, callbackState, isAnalog)
     if not _isPress(inputValue, callbackState) then return end
+    if _isCompatibilityBlocked() then return end
     if HP_AppearanceBindingsGui ~= nil and HP_AppearanceBindingsGui.open ~= nil then
         HP_AppearanceBindingsGui:open()
     elseif HP_AppearanceMenu ~= nil and HP_AppearanceMenu.toggle ~= nil then
@@ -120,6 +128,7 @@ local function _unregisterPlayerAction(field, label)
 end
 
 local function _registerPlayerActions()
+    if _isCompatibilityBlocked() then return end
     _registerPlayerAction("_playerCycleId", InputAction.OPEN_HELPER_MENU, HelperProfiles, _onCycle, "OPEN_HELPER_MENU")
     _registerPlayerAction("_playerToggleId", InputAction.HP_TOGGLE_OVERLAY, HP_UI, _onToggle, "HP_TOGGLE_OVERLAY")
     _registerPlayerAction("_playerModeId", InputAction.HP_TOGGLE_MODE, HelperProfiles, _onMode, "HP_TOGGLE_MODE")
@@ -186,6 +195,7 @@ local function _addVehicleAction(vehicle, spec, inputAction, target, callback, l
 end
 
 local function _registerVehicleActions(vehicle, isActiveForInput)
+    if _isCompatibilityBlocked() then return end
     if not isActiveForInput or vehicle == nil or vehicle.addActionEvent == nil then return end
     local spec = _ensureVehicleSpec(vehicle)