diff --git a/src/backend/game.cpp b/src/backend/game.cpp
index 0b5b22c1..f9164d5c 100644
--- a/src/backend/game.cpp
+++ b/src/backend/game.cpp
@@ -362,10 +362,6 @@ namespace loot {
         }
     }
 
-    bool Game::IsActive(const std::string& plugin) const {
-        return activePlugins.find(boost::locale::to_lower(plugin)) != activePlugins.end();
-    }
-
     void Game::GetLoadOrder(std::list<std::string>& loadOrder) const {
         BOOST_LOG_TRIVIAL(debug) << "Getting load order for game: " << _name;
 
@@ -486,7 +482,7 @@ namespace loot {
         //First calculate the mean plugin size. Store it temporarily in a map to reduce filesystem lookups and file size recalculation.
         BOOST_LOG_TRIVIAL(trace) << "Scanning for plugins in " << this->DataPath();
         for (fs::directory_iterator it(this->DataPath()); it != fs::directory_iterator(); ++it) {
-            if (fs::is_regular_file(it->status()) && this->IsValidPlugin(it->path().filename().string())) {
+            if (fs::is_regular_file(it->status()) && Plugin(it->path().filename().string()).IsValid(*this)) {
                 uintmax_t fileSize = fs::file_size(it->path());
                 meanFileSize += fileSize;
 
@@ -551,37 +547,6 @@ namespace loot {
         return false;
     }
 
-    bool Game::IsValidPlugin(const std::string& name) const {
-        BOOST_LOG_TRIVIAL(trace) << "Checking to see if \"" << name << "\" is a valid plugin.";
-        // Rather than just checking the extension, try also parsing the file header, and see if it fails.
-        if (!boost::iends_with(name, ".esm") && !boost::iends_with(name, ".esp") && !boost::iends_with(name, ".esm.ghost") && !boost::iends_with(name, ".esp.ghost")) {
-            return false;
-        }
-
-        try {
-            string filepath = (this->DataPath() / name).string();
-            if (fs::exists(this->DataPath() / fs::path(name + ".ghost")))
-                filepath += ".ghost";
-
-            espm::File * file = nullptr;
-            if (this->Id() == LIBLO_GAME_TES4)
-                file = new espm::tes4::File(filepath, this->espm_settings, false, true);
-            else if (this->Id() == LIBLO_GAME_TES5)
-                file = new espm::tes5::File(filepath, this->espm_settings, false, true);
-            else if (this->Id() == LIBLO_GAME_FO3)
-                file = new espm::fo3::File(filepath, this->espm_settings, false, true);
-            else
-                file = new espm::fonv::File(filepath, this->espm_settings, false, true);
-
-            delete file;
-        }
-        catch (std::exception& /*e*/) {
-            BOOST_LOG_TRIVIAL(warning) << "The .es(p|m) file \"" << name << "\" is not a valid plugin.";
-            return false;
-        }
-        return true;
-    }
-
     void Game::CreateLOOTGameFolder() {
         //Make sure that the LOOT game path exists.
         try {
diff --git a/src/backend/game.h b/src/backend/game.h
index 417d7e13..8f0f8b03 100644
--- a/src/backend/game.h
+++ b/src/backend/game.h
@@ -73,9 +73,6 @@ namespace loot {
         boost::filesystem::path MasterlistPath() const;
         boost::filesystem::path UserlistPath() const;
 
-        //Game plugin functions.
-        bool IsActive(const std::string& plugin) const;
-
         void GetLoadOrder(std::list<std::string>& loadOrder) const;
         void SetLoadOrder(const std::list<std::string>& loadOrder) const;  //Modifies game load order, even though const.
         void SetLoadOrder(const char * const * const loadOrder, const size_t numPlugins) const;  // For API.
@@ -85,13 +82,12 @@ namespace loot {
         void LoadPlugins(bool headersOnly);  //Loads all installed plugins.
         bool HasBeenLoaded();  // Checks if the game's plugins have already been loaded.
 
-        bool IsValidPlugin(const std::string& name) const;
-
         std::list<Plugin> Sort(const unsigned int language, std::function<void(const std::string&)> progressCallback);
 
         //Caches for condition results, active plugins and CRCs.
         std::unordered_map<std::string, bool> conditionCache;  //Holds lowercased strings.
         std::unordered_map<std::string, uint32_t> crcCache;  //Holds lowercased strings.
+        std::unordered_set<std::string> activePlugins;  //Holds lowercased strings.
 
         //Plugin data and metadata lists.
         Masterlist masterlist;
@@ -119,8 +115,6 @@ namespace loot {
         boost::filesystem::path gamePath;  //Path to the game's folder.
         boost::filesystem::path _gameLocalDataPath;  // Path to the game's folder in %LOCALAPPDATA%.
 
-        std::unordered_set<std::string> activePlugins;  //Holds lowercased strings.
-
         lo_game_handle gh;
 
         //Creates directory in LOOT folder for LOOT's game-specific files.
diff --git a/src/backend/metadata/condition_grammar.h b/src/backend/metadata/condition_grammar.h
index dad8a648..8c7f9c70 100644
--- a/src/backend/metadata/condition_grammar.h
+++ b/src/backend/metadata/condition_grammar.h
@@ -292,7 +292,7 @@ namespace loot {
             Version trueVersion;
             if (file == "LOOT")
                 trueVersion = Version(boost::filesystem::absolute("LOOT.exe"));
-            else if (_game->IsValidPlugin(file)) {
+            else if (Plugin(file).IsValid(*_game)) {
                 Plugin plugin(*_game, file, true);
                 trueVersion = Version(plugin.Version());
             }
@@ -319,7 +319,7 @@ namespace loot {
             if (file == "LOOT")
                 result = false;
             else
-                result = _game->IsActive(file);
+                result = Plugin(file).IsActive(*_game);
 
             BOOST_LOG_TRIVIAL(trace) << "Active check result: " << result;
         }
diff --git a/src/backend/plugin.cpp b/src/backend/plugin.cpp
index 0a20a45c..c59c9a4e 100644
--- a/src/backend/plugin.cpp
+++ b/src/backend/plugin.cpp
@@ -214,6 +214,42 @@ namespace loot {
         return _isEmpty;
     }
 
+    bool Plugin::IsValid(const Game& game) const {
+        BOOST_LOG_TRIVIAL(trace) << "Checking to see if \"" << name << "\" is a valid plugin.";
+        // Rather than just checking the extension, try also parsing the file header, and see if it fails.
+        if (!boost::iends_with(name, ".esm") && !boost::iends_with(name, ".esp")) {
+            return false;
+        }
+
+        try {
+            boost::filesystem::path filepath = game.DataPath() / name;
+            //In case the plugin is ghosted.
+            if (!boost::filesystem::exists(filepath) && boost::filesystem::exists(filepath.string() + ".ghost"))
+                filepath += ".ghost";
+
+            espm::File * file = nullptr;
+            if (game.Id() == Game::tes4)
+                file = new espm::tes4::File(filepath, game.espm_settings, false, true);
+            else if (game.Id() == Game::tes5)
+                file = new espm::tes5::File(filepath, game.espm_settings, false, true);
+            else if (game.Id() == Game::fo3)
+                file = new espm::fo3::File(filepath, game.espm_settings, false, true);
+            else
+                file = new espm::fonv::File(filepath, game.espm_settings, false, true);
+
+            delete file;
+        }
+        catch (std::exception& /*e*/) {
+            BOOST_LOG_TRIVIAL(warning) << "The .es(p|m) file \"" << name << "\" is not a valid plugin.";
+            return false;
+        }
+        return true;
+    }
+
+    bool Plugin::IsActive(const Game& game) const {
+        return game.activePlugins.find(boost::locale::to_lower(name)) != game.activePlugins.end();
+    }
+
     std::string Plugin::Version() const {
         return version;
     }
@@ -225,7 +261,7 @@ namespace loot {
     bool Plugin::CheckInstallValidity(const Game& game) {
         BOOST_LOG_TRIVIAL(trace) << "Checking that the current install is valid according to " << name << "'s data.";
         unsigned int messageType;
-        if (game.IsActive(name))
+        if (IsActive(game))
             messageType = loot::Message::error;
         else
             messageType = loot::Message::warn;
@@ -235,7 +271,7 @@ namespace loot {
                     BOOST_LOG_TRIVIAL(error) << "\"" << name << "\" requires \"" << master << "\", but it is missing.";
                     messages.push_back(loot::Message(messageType, (boost::format(boost::locale::translate("This plugin requires \"%1%\" to be installed, but it is missing.")) % master).str()));
                 }
-                else if (!game.IsActive(master)) {
+                else if (!Plugin(master).IsActive(game)) {
                     BOOST_LOG_TRIVIAL(error) << "\"" << name << "\" requires \"" << master << "\", but it is inactive.";
                     messages.push_back(loot::Message(messageType, (boost::format(boost::locale::translate("This plugin requires \"%1%\" to be active, but it is inactive.")) % master).str()));
                 }
@@ -249,7 +285,7 @@ namespace loot {
         }
         for (const auto &inc : incompatibilities) {
             if (boost::filesystem::exists(game.DataPath() / inc.Name()) || ((boost::iends_with(inc.Name(), ".esp") || boost::iends_with(inc.Name(), ".esm")) && boost::filesystem::exists(game.DataPath() / (inc.Name() + ".ghost")))) {
-                if (!game.IsActive(inc.Name()))
+                if (!Plugin(inc.Name()).IsActive(game))
                     messageType = loot::Message::warn;
                 BOOST_LOG_TRIVIAL(error) << "\"" << name << "\" is incompatible with \"" << inc.Name() << "\", but both are present.";
                 messages.push_back(loot::Message(messageType, (boost::format(boost::locale::translate("This plugin is incompatible with \"%1%\", but both are present.")) % inc.Name()).str()));
diff --git a/src/backend/plugin.h b/src/backend/plugin.h
index 19c52199..4aa2f1dc 100644
--- a/src/backend/plugin.h
+++ b/src/backend/plugin.h
@@ -52,6 +52,8 @@ namespace loot {
         uint32_t Crc() const;
 
         bool LoadsBSA(const Game& game) const;
+        bool IsValid(const Game& game) const;
+        bool IsActive(const Game& game) const;
 
         //Compare name strings.
         bool operator == (const Plugin& rhs) const;
diff --git a/src/gui/handler.cpp b/src/gui/handler.cpp
index d81ec597..3c913c78 100644
--- a/src/gui/handler.cpp
+++ b/src/gui/handler.cpp
@@ -333,7 +333,7 @@ namespace loot {
                 }
                 size_t i = 0;
                 for (const auto& plugin : plugins) {
-                    if (_lootState.CurrentGame().IsActive(plugin)) {
+                    if (Plugin(plugin).IsActive(_lootState.CurrentGame())) {
                         ss << setw(decLength) << i << " " << hex << setw(2) << i << dec << " ";
                         ++i;
                     }
@@ -709,7 +709,7 @@ namespace loot {
 
                 pluginNode["__type"] = "Plugin";  // For conversion back into a JS typed object.
                 pluginNode["name"] = plugin.Name();
-                pluginNode["isActive"] = _lootState.CurrentGame().IsActive(plugin.Name());
+                pluginNode["isActive"] = plugin.IsActive(_lootState.CurrentGame());
                 pluginNode["isEmpty"] = plugin.IsEmpty();
                 pluginNode["isMaster"] = plugin.IsMaster();
                 pluginNode["loadsBSA"] = plugin.LoadsBSA(_lootState.CurrentGame());