diff --git a/PowerEditor/src/MISC/PluginsManager/PluginsManager.cpp b/PowerEditor/src/MISC/PluginsManager/PluginsManager.cpp
index d42a5ae8..f74e7cbe 100644
--- a/PowerEditor/src/MISC/PluginsManager/PluginsManager.cpp
+++ b/PowerEditor/src/MISC/PluginsManager/PluginsManager.cpp
@@ -47,6 +47,10 @@ bool PluginsManager::unloadPlugin(int index, HWND nppHandle)
 
 int PluginsManager::loadPlugin(const TCHAR *pluginFilePath, vector<generic_string> & dll2Remove)
 {
+	const TCHAR *pluginFileName = ::PathFindFileName(pluginFilePath);
+	if (isInLoadedDlls(pluginFileName))
+		return 0;
+
 	PluginInfo *pi = new PluginInfo;
 	try {
 		pi->_moduleName = PathFindFileName(pluginFilePath);
@@ -181,7 +185,7 @@ int PluginsManager::loadPlugin(const TCHAR *pluginFilePath, vector<generic_strin
 			::SendMessage(_nppData._scintillaMainHandle, SCI_LOADLEXERLIBRARY, 0, (LPARAM)pDllName);
             
 		}
-        
+		addInLoadedDlls(pluginFileName);
 		_pluginInfos.push_back(pi);
         return (_pluginInfos.size() - 1);
 	} catch(std::exception e) {
@@ -217,8 +221,8 @@ bool PluginsManager::loadPlugins(const TCHAR *dir)
 
 	vector<generic_string> dllNames;
 	vector<generic_string> dll2Remove;
-    generic_string nppPath = (NppParameters::getInstance())->getNppPath();
-
+	NppParameters * nppParams = NppParameters::getInstance();
+    generic_string nppPath = nppParams->getNppPath();
 	generic_string pluginsFullPathFilter = (dir && dir[0])?dir:nppPath;
 
 	pluginsFullPathFilter += TEXT("\\plugins\\*.dll");
@@ -232,8 +236,6 @@ bool PluginsManager::loadPlugins(const TCHAR *dir)
 		plugins1stFullPath += foundData.cFileName;
 		dllNames.push_back(plugins1stFullPath);
 
-        NppParameters * nppParams = NppParameters::getInstance();
-
 		while (::FindNextFile(hFindFile, &foundData))
 		{
             bool isInBlackList = nppParams->isInBlackList(foundData.cFileName);
diff --git a/PowerEditor/src/MISC/PluginsManager/PluginsManager.h b/PowerEditor/src/MISC/PluginsManager/PluginsManager.h
index 8273e19c..d6b795a7 100644
--- a/PowerEditor/src/MISC/PluginsManager/PluginsManager.h
+++ b/PowerEditor/src/MISC/PluginsManager/PluginsManager.h
@@ -120,6 +120,7 @@ private:
 
 	vector<PluginInfo *> _pluginInfos;
 	vector<PluginCommand> _pluginsCommands;
+	vector<generic_string> _loadedDlls;
 	bool _isDisabled;
 	IDAllocator _dynamicIDAlloc;
 	IDAllocator _markerAlloc;
@@ -129,6 +130,16 @@ private:
 		msg += funcSignature;
 		::MessageBox(NULL, msg.c_str(), TEXT(" just crash in\r"), MB_OK|MB_ICONSTOP);
 	};
+	bool isInLoadedDlls(const TCHAR *fn) const {
+		for (size_t i = 0; i < _loadedDlls.size(); i++)
+			if (generic_stricmp(fn, _loadedDlls[i].c_str()) == 0)
+				return true;
+		return false;
+	};
+
+	void addInLoadedDlls(const TCHAR *fn) {
+		_loadedDlls.push_back(fn);
+	};
 };
 
 #define EXT_LEXER_DECL __stdcall
diff --git a/PowerEditor/src/Notepad_plus.cpp b/PowerEditor/src/Notepad_plus.cpp
index e3936cc8..6a9f3fe1 100644
--- a/PowerEditor/src/Notepad_plus.cpp
+++ b/PowerEditor/src/Notepad_plus.cpp
@@ -341,11 +341,19 @@ LRESULT Notepad_plus::init(HWND hwnd)
 
 	_scintillaCtrls4Plugins.init(_pPublicInterface->getHinst(), hwnd);
 	_pluginsManager.init(nppData);
-	_pluginsManager.loadPlugins();
+
+	// Load plugins firstly from "%APPDATA%/Notepad++/plugins" 
+	// if Notepad++ is not in localConf mode. 
+	// All the dll loaded are marked.
 	const TCHAR *appDataNpp = pNppParam->getAppDataNppDir();
 	if (appDataNpp[0])
 		_pluginsManager.loadPlugins(appDataNpp);
 
+	// Load plugins from its installation directory.
+	// All loaded dll will be ignored
+	_pluginsManager.loadPlugins();
+	
+
     _restoreButton.init(_pPublicInterface->getHinst(), hwnd);
     
 
diff --git a/PowerEditor/src/Parameters.cpp b/PowerEditor/src/Parameters.cpp
index 0449e377..837a3323 100644
--- a/PowerEditor/src/Parameters.cpp
+++ b/PowerEditor/src/Parameters.cpp
@@ -771,11 +771,11 @@ bool NppParameters::load()
 	PathAppend(localConfPath, localConfFile);
 
 	// Test if localConf.xml exist
-	bool isLocal = (PathFileExists(localConfPath.c_str()) == TRUE);
+	_isLocal = (PathFileExists(localConfPath.c_str()) == TRUE);
 
     // Under vista and windows 7, the usage of doLocalConf.xml is not allowed
     // if Notepad++ is installed in "program files" directory, because of UAC
-    if (isLocal)
+    if (_isLocal)
     {
         // We check if OS is Vista or above
         if (_winVersion >= WV_VISTA)
@@ -789,11 +789,11 @@ bool NppParameters::load()
             ::PathRemoveFileSpec(nppDirLocation);
             	
             if  (lstrcmp(progPath, nppDirLocation) == 0)
-                isLocal = false;
+                _isLocal = false;
         }
     }
 
-	if (isLocal)
+	if (_isLocal)
 	{
 		_userPath = _nppPath;
 	}
diff --git a/PowerEditor/src/Parameters.h b/PowerEditor/src/Parameters.h
index 9e12367f..5d4eda69 100644
--- a/PowerEditor/src/Parameters.h
+++ b/PowerEditor/src/Parameters.h
@@ -1422,6 +1422,10 @@ public:
 		_pNativeLangSpeaker = nls;
 	};
 
+	bool isLocal() const {
+		return _isLocal;
+	};
+
 private:
     NppParameters();
 	~NppParameters();
@@ -1478,6 +1482,7 @@ private:
 
 	WNDPROC _transparentFuncAddr;
 	WNDPROC _enableThemeDialogTextureFuncAddr;
+	bool _isLocal;
 
 
 	vector<CommandShortcut> _shortcuts;			//main menu shortuts. Static size