diff --git a/PowerEditor/bin/change.log b/PowerEditor/bin/change.log
index 2b8a60ec2..22873066e 100644
--- a/PowerEditor/bin/change.log
+++ b/PowerEditor/bin/change.log
@@ -1,4 +1,4 @@
-Notepad++ v4.9.1 fixed bugs and added features (from v4.8.5) :
+Notepad++ v4.9.2 fixed bugs and added features (from v4.8.5) :
 
 1.  Add smart highlighting feature (double click a word to highlight all the same word in the document).
 2.  Enhance visual effect of Mark all feature.
@@ -17,7 +17,7 @@ Notepad++ v4.9.1 fixed bugs and added features (from v4.8.5) :
 15. Make search in hidden directory (for Find in files) optional.
 16. Fix the replace bug while replacing nothing.
 17. Fix the F3 searching direction bug.
-
+18. Fix the regression bug that x position doesn't be restored while switching back a document.
 
 Included plugins :
 
diff --git a/PowerEditor/src/Notepad_plus.cpp b/PowerEditor/src/Notepad_plus.cpp
index 7dd7a5f62..2d19c74e7 100644
--- a/PowerEditor/src/Notepad_plus.cpp
+++ b/PowerEditor/src/Notepad_plus.cpp
@@ -2140,7 +2140,7 @@ BOOL Notepad_plus::notify(SCNotification *notification)
         {
             _pEditView->marginClick(notification->position, notification->modifiers);
         }
-        else if (notification->margin == ScintillaEditView::_SC_MARGE_SYBOLE)
+        else if ((notification->margin == ScintillaEditView::_SC_MARGE_SYBOLE) && !notification->modifiers)
         {
             
             int lineClick = int(_pEditView->execute(SCI_LINEFROMPOSITION, notification->position));
@@ -2599,7 +2599,7 @@ void Notepad_plus::specialCmd(int id, int param)
 		{
 			ValueDlg nbColumnEdgeDlg;
 			ScintillaViewParams & svp = (ScintillaViewParams &)pNppParam->getSVP(param == 1?SCIV_PRIMARY:SCIV_SECOND);
-			nbColumnEdgeDlg.init(_hInst, _hSelf, svp._edgeNbColumn, "Nb of column:");
+			nbColumnEdgeDlg.init(_hInst, _preference.getHSelf(), svp._edgeNbColumn, "Nb of column:");
 			nbColumnEdgeDlg.setNBNumber(3);
 
 			POINT p;
@@ -3642,7 +3642,7 @@ void Notepad_plus::command(int id)
 		{
 			ValueDlg tabSizeDlg;
 			NppGUI & nppgui = (NppGUI &)(pNppParam->getNppGUI());
-			tabSizeDlg.init(_hInst, _hSelf, nppgui._tabSize, "Tab Size : ");
+			tabSizeDlg.init(_hInst, _preference.getHSelf(), nppgui._tabSize, "Tab Size : ");
 			POINT p;
 			::GetCursorPos(&p);
 			::ScreenToClient(_hParent, &p);
@@ -3663,7 +3663,7 @@ void Notepad_plus::command(int id)
 
 			ValueDlg valDlg;
 			NppGUI & nppGUI = (NppGUI &)((NppParameters::getInstance())->getNppGUI());
-			valDlg.init(_hInst, _hSelf, nppGUI._autocFromLen, "Nb char : ");
+			valDlg.init(_hInst, _preference.getHSelf(), nppGUI._autocFromLen, "Nb char : ");
 			POINT p;
 			::GetCursorPos(&p);
 			::ScreenToClient(_hParent, &p);
@@ -3685,7 +3685,7 @@ void Notepad_plus::command(int id)
 		{
 			ValueDlg nbHistoryDlg;
 			NppParameters *pNppParam = NppParameters::getInstance();
-			nbHistoryDlg.init(_hInst, _hSelf, pNppParam->getNbMaxFile(), "Max File : ");
+			nbHistoryDlg.init(_hInst, _preference.getHSelf(), pNppParam->getNbMaxFile(), "Max File : ");
 			POINT p;
 			::GetCursorPos(&p);
 			::ScreenToClient(_hParent, &p);
@@ -6320,7 +6320,7 @@ LRESULT Notepad_plus::runProc(HWND hwnd, UINT Message, WPARAM wParam, LPARAM lPa
 			//Add recent files
 			HMENU hFileMenu = ::GetSubMenu(_mainMenuHandle, MENUINDEX_FILE);
 			int nbLRFile = pNppParam->getNbLRFile();
-			int pos = 16;
+			int pos = 17;
 
 			_lastRecentFileList.initMenu(hFileMenu, IDM_FILEMENU_LASTONE + 1, pos);
 			for (int i = 0 ; i < nbLRFile ; i++)
diff --git a/PowerEditor/src/Notepad_plus.rc b/PowerEditor/src/Notepad_plus.rc
index 77749c33c..d70ceb2ad 100644
--- a/PowerEditor/src/Notepad_plus.rc
+++ b/PowerEditor/src/Notepad_plus.rc
@@ -249,7 +249,7 @@ BEGIN
         MENUITEM "Re&load from disk",            IDM_FILE_RELOAD
         MENUITEM "&Save",                 IDM_FILE_SAVE
         MENUITEM "Save &As...",                 IDM_FILE_SAVEAS
-        MENUITEM "Save Copy As...",                 IDM_FILE_SAVECOPYAS
+        MENUITEM "Save a Copy As...",                 IDM_FILE_SAVECOPYAS
         MENUITEM "Sav&e All",                 IDM_FILE_SAVEALL
         MENUITEM "&Close",                IDM_FILE_CLOSE
         MENUITEM "Cl&ose All",                            IDM_FILE_CLOSEALL
diff --git a/PowerEditor/src/Parameters.cpp b/PowerEditor/src/Parameters.cpp
index cc56c1f74..30aea5db9 100644
--- a/PowerEditor/src/Parameters.cpp
+++ b/PowerEditor/src/Parameters.cpp
@@ -49,6 +49,7 @@ WinMenuKeyDefinition winKeyDefs[] = {	//array of accelerator keys for all std me
 	{VK_NULL,	IDM_FILE_RELOAD,					false, false, false, NULL},
 	{VK_S,		IDM_FILE_SAVE,						true,  false, false, NULL},
 	{VK_S,		IDM_FILE_SAVEAS,					true,  true,  false, NULL},
+	{VK_NULL,	IDM_FILE_SAVECOPYAS,				false, false, false, NULL},
 	{VK_S,		IDM_FILE_SAVEALL,					true,  false, true,  NULL},
 	{VK_W,	 	IDM_FILE_CLOSE,						true,  false, false, NULL},
 	{VK_NULL,	IDM_FILE_CLOSEALL,					false, false, false, NULL},
@@ -1106,6 +1107,7 @@ bool NppParameters::getSessionFromXmlTree(TiXmlDocument *pSessionDoc, Session *p
 				(childNode->ToElement())->Attribute("startPos", &position._startPos);
 				(childNode->ToElement())->Attribute("endPos", &position._endPos);
 				(childNode->ToElement())->Attribute("selMode", &position._selMode);
+				(childNode->ToElement())->Attribute("scrollWidth", &position._scrollWidth);
 
 				const char *langName;
 				langName = (childNode->ToElement())->Attribute( "lang" );
@@ -1150,6 +1152,7 @@ bool NppParameters::getSessionFromXmlTree(TiXmlDocument *pSessionDoc, Session *p
 				(childNode->ToElement())->Attribute("startPos", &position._startPos);
 				(childNode->ToElement())->Attribute("endPos", &position._endPos);
 				(childNode->ToElement())->Attribute("selMode", &position._selMode);
+				(childNode->ToElement())->Attribute("scrollWidth", &position._scrollWidth);
 
 				const char *langName;
 				langName = (childNode->ToElement())->Attribute( "lang" );
@@ -1603,9 +1606,10 @@ void NppParameters::writeSession(const Session & session, const char *fileName)
 		for (size_t i = 0 ; i < session._mainViewFiles.size() ; i++)
 		{
 			TiXmlNode *fileNameNode = mainViewNode->InsertEndChild(TiXmlElement("File"));
-			
+		
 			(fileNameNode->ToElement())->SetAttribute("firstVisibleLine", session._mainViewFiles[i]._firstVisibleLine);
 			(fileNameNode->ToElement())->SetAttribute("xOffset", session._mainViewFiles[i]._xOffset);
+			(fileNameNode->ToElement())->SetAttribute("scrollWidth", session._mainViewFiles[i]._scrollWidth);
 			(fileNameNode->ToElement())->SetAttribute("startPos", session._mainViewFiles[i]._startPos);
 			(fileNameNode->ToElement())->SetAttribute("endPos", session._mainViewFiles[i]._endPos);
 			(fileNameNode->ToElement())->SetAttribute("selMode", session._mainViewFiles[i]._selMode);
@@ -1628,6 +1632,7 @@ void NppParameters::writeSession(const Session & session, const char *fileName)
 			
 			(fileNameNode->ToElement())->SetAttribute("firstVisibleLine", session._subViewFiles[i]._firstVisibleLine);
 			(fileNameNode->ToElement())->SetAttribute("xOffset", session._subViewFiles[i]._xOffset);
+			(fileNameNode->ToElement())->SetAttribute("scrollWidth", session._subViewFiles[i]._scrollWidth);
 			(fileNameNode->ToElement())->SetAttribute("startPos", session._subViewFiles[i]._startPos);
 			(fileNameNode->ToElement())->SetAttribute("endPos", session._subViewFiles[i]._endPos);
 			(fileNameNode->ToElement())->SetAttribute("selMode", session._subViewFiles[i]._selMode);
diff --git a/PowerEditor/src/Parameters.h b/PowerEditor/src/Parameters.h
index f9c9ca1d2..0d6f2666d 100644
--- a/PowerEditor/src/Parameters.h
+++ b/PowerEditor/src/Parameters.h
@@ -98,6 +98,8 @@ struct Position
 	int _endPos;
 	int _xOffset;
 	int _selMode;
+	int _scrollWidth;
+	Position() : _firstVisibleLine(0), _startPos(0), _endPos(0), _xOffset(0), _scrollWidth(1), _selMode(0) {};
 };
 
 struct sessionFileInfo : public Position {
diff --git a/PowerEditor/src/ScitillaComponent/Buffer.h b/PowerEditor/src/ScitillaComponent/Buffer.h
index dcc7015e9..88ed05736 100644
--- a/PowerEditor/src/ScitillaComponent/Buffer.h
+++ b/PowerEditor/src/ScitillaComponent/Buffer.h
@@ -100,6 +100,7 @@ public :
 		_pos._startPos = 0;
 		_pos._endPos = 0;
 		_pos._xOffset = 0;
+		_pos._scrollWidth = 1;
 		setFileName(fileName, ndds._lang);
 		//_userLangExt[0] = '\0';
 	};
diff --git a/PowerEditor/src/ScitillaComponent/ScintillaEditView.cpp b/PowerEditor/src/ScitillaComponent/ScintillaEditView.cpp
index 3618b5c5a..6f8f53d70 100644
--- a/PowerEditor/src/ScitillaComponent/ScintillaEditView.cpp
+++ b/PowerEditor/src/ScitillaComponent/ScintillaEditView.cpp
@@ -109,6 +109,7 @@ void ScintillaEditView::init(HINSTANCE hInst, HWND hPere)
 	execute(SCI_SETPROPERTY, reinterpret_cast<WPARAM>("fold.preprocessor"), reinterpret_cast<LPARAM>("1"));
     execute(SCI_SETFOLDFLAGS, 16);
 	execute(SCI_SETSCROLLWIDTHTRACKING, true);
+	execute(SCI_SETSCROLLWIDTH, 1);	//default empty document: override default width of 2000
 
 	// smart hilighting
 	execute(SCI_INDICSETSTYLE, SCE_UNIVERSAL_FOUND_STYLE_2, INDIC_ROUNDBOX);
@@ -938,6 +939,7 @@ void ScintillaEditView::saveCurrentPos()
 	buf._pos._endPos = static_cast<int>(execute(SCI_GETSELECTIONEND));
 	buf._pos._xOffset = static_cast<int>(execute(SCI_GETXOFFSET));
 	buf._pos._selMode = execute(SCI_GETSELECTIONMODE);
+	buf._pos._scrollWidth = execute(SCI_GETSCROLLWIDTH);
 }
 
 void ScintillaEditView::restoreCurrentPos()
@@ -953,14 +955,20 @@ void ScintillaEditView::restoreCurrentPos()
 	}
 	execute(SCI_SETSELECTIONSTART, buf._pos._startPos);
 	execute(SCI_SETSELECTIONEND, buf._pos._endPos);
+
+	//int scrollWidth = execute(SCI_GETSCROLLWIDTH);
+	//execute(SCI_SETSCROLLWIDTH, scrollWidth);
+	execute(SCI_SETSCROLLWIDTH, buf._pos._scrollWidth);
+	
 	execute(SCI_SETXOFFSET, buf._pos._xOffset);
 
-	// these 2 lines should be at the end so it works in wrap mode 
+	// these 3 lines should be at the end so it works in wrap mode 
 	int lineToShow = execute(SCI_VISIBLEFROMDOCLINE, buf._pos._firstVisibleLine);
 	scroll(0, lineToShow);
 }
 
 
+
 //! \brief this method activates the doc and the corresponding sub tab
 //! \brief return the index of previeus current doc
 char * ScintillaEditView::activateDocAt(int index)
@@ -968,7 +976,7 @@ char * ScintillaEditView::activateDocAt(int index)
 	::SendMessage(_hParent, NPPM_INTERNAL_DOCSWITCHOFF, 0, (LPARAM)_hSelf);
 	
 	// To minimize the scroll width on each doc switch
-	execute(SCI_SETSCROLLWIDTH, 1);
+	//execute(SCI_SETSCROLLWIDTH, 1);
 
 	// before activating another document, we get the current position
 	// from the Scintilla view then save it to the current document
@@ -1008,6 +1016,10 @@ char * ScintillaEditView::activateDocAt(int index)
 	_currentIndex = index;
 	
 	_buffers[_currentIndex].increaseRecentTag();
+ 
+	// Due to execute(SCI_CLEARDOCUMENTSTYLE); in defineDocType() function
+	// defineDocType() function should be called here, but not be after the fold info loop
+    defineDocType(_buffers[_currentIndex]._lang);
 
 	// restore the collapsed info
 	int nbLineState = _buffers[_currentIndex]._foldState.size();
@@ -1023,17 +1035,11 @@ char * ScintillaEditView::activateDocAt(int index)
 			execute(SCI_TOGGLEFOLD, hls._headerLineNumber);
 	}
 
-    //if (isDocTypeDiff)
-    defineDocType(_buffers[_currentIndex]._lang);
-
 	restoreCurrentPos();
 
 	execute(SCI_SETEOLMODE, _buffers[_currentIndex]._format);
 	::SendMessage(_hParent, NPPM_INTERNAL_DOCSWITCHIN, 0, (LPARAM)_hSelf);
 
-	//recalcHorizontalScrollbar();		//Update scrollbar after switching file
-//execute(SCI_SETSCROLLWIDTHTRACKING, false);
-
     return _buffers[_currentIndex]._fullPathName;
 }
 
@@ -1748,43 +1754,7 @@ void ScintillaEditView::columnReplace(const ColumnModeInfo & cmi, const char ch)
 		execute(SCI_REPLACETARGET, -1, (LPARAM)str.c_str());
 	}
 }
-/*
-//This method recalculates the horizontal scrollbar based
-//on the current visible text and styler.
-void ScintillaEditView::recalcHorizontalScrollbar() 
-{
-	int curOffset = execute(SCI_GETXOFFSET);
-	int maxPixel = 0, curLen;
-	int numLines = int(execute(SCI_GETLINECOUNT));
-	int startLine = execute(SCI_GETFIRSTVISIBLELINE);
-	int endLine =  startLine + execute(SCI_LINESONSCREEN);
-	if ( endLine >= (execute(SCI_GETLINECOUNT) - 1) )
-		endLine--;
-	long beginPosition, endPosition;
-
-	int visibleLine = 0;
-	for( int i = startLine ; i <= endLine ; i++ ) 
-	{	
-		//for all _visible_ lines
-		visibleLine = (int) execute(SCI_DOCLINEFROMVISIBLE, i);			//get actual visible line, folding may offset lines
-		endPosition = execute(SCI_GETLINEENDPOSITION, visibleLine);		//get character position from begin
-        beginPosition = execute(SCI_POSITIONFROMLINE, visibleLine);		//and end of line
-
-		curLen = execute(SCI_POINTXFROMPOSITION, 0, endPosition) -		//Then let Scintilla get pixel width with
-				 execute(SCI_POINTXFROMPOSITION, 0, beginPosition);		//current styler
-		if (maxPixel < curLen) {										//If its the largest line yet
-			maxPixel = curLen;											//Use that length
-		}
-	}
-	
-	if (maxPixel == 0)
-		maxPixel++;														//make sure maxPixel is valid
 
-	int currentLength = execute(SCI_GETSCROLLWIDTH);					//Get current scrollbar size
-	if (currentLength != maxPixel)										//And if it is not the same
-		execute(SCI_SETSCROLLWIDTH, maxPixel);							//update it
-}
-*/
 void ScintillaEditView::foldChanged(int line, int levelNow, int levelPrev)
 {
 	if (levelNow & SC_FOLDLEVELHEADERFLAG)
diff --git a/PowerEditor/src/WinControls/AboutDlg/AboutDlg.cpp b/PowerEditor/src/WinControls/AboutDlg/AboutDlg.cpp
index 5440d197f..c149b61f8 100644
--- a/PowerEditor/src/WinControls/AboutDlg/AboutDlg.cpp
+++ b/PowerEditor/src/WinControls/AboutDlg/AboutDlg.cpp
@@ -70,7 +70,8 @@ BOOL CALLBACK AboutDlg::run_dlgProc(UINT message, WPARAM wParam, LPARAM lParam)
 		{
 			switch (wParam)
 			{
-				case IDOK : // Find Next
+				case IDCANCEL :
+				case IDOK : 
 					display(false);
 					return TRUE;
 
diff --git a/PowerEditor/src/menuCmdID.h b/PowerEditor/src/menuCmdID.h
index 85eb48c90..d6cf1aadf 100644
--- a/PowerEditor/src/menuCmdID.h
+++ b/PowerEditor/src/menuCmdID.h
@@ -39,7 +39,7 @@
 	#define	IDM_FILE_SAVECOPYAS     	(IDM_FILE + 15)
  
  // A mettre à jour si on ajoute nouveau menu item dans le menu "File"
-	#define	IDM_FILEMENU_LASTONE	IDM_FILE_RELOAD
+	#define	IDM_FILEMENU_LASTONE	IDM_FILE_SAVECOPYAS
  
 #define	IDM_EDIT       (IDM + 2000)
 	#define	IDM_EDIT_CUT					(IDM_EDIT + 1) 
diff --git a/PowerEditor/src/resource.h b/PowerEditor/src/resource.h
index 36dd4c9f3..5b025ceb0 100644
--- a/PowerEditor/src/resource.h
+++ b/PowerEditor/src/resource.h
@@ -18,9 +18,9 @@
 #ifndef RESOURCE_H
 #define RESOURCE_H
 
-#define NOTEPAD_PLUS_VERSION	"Notepad++ v4.9.1"
-#define VERSION_VALUE "4.91\0"  // should be X.Y : ie. if VERSION_DIGITALVALUE == 4, 7, 1, 0 , then X = 4, Y = 71 
-#define VERSION_DIGITALVALUE 4, 9, 1, 0
+#define NOTEPAD_PLUS_VERSION	"Notepad++ v4.9.2"
+#define VERSION_VALUE "4.92\0"  // should be X.Y : ie. if VERSION_DIGITALVALUE == 4, 7, 1, 0 , then X = 4, Y = 71 
+#define VERSION_DIGITALVALUE 4, 9, 2, 0
 
 #ifndef IDC_STATIC
 #define IDC_STATIC	-1