diff --git a/PowerEditor/src/WinControls/Preference/preference.rc b/PowerEditor/src/WinControls/Preference/preference.rc
index 173e3aa3f..20f683cdb 100644
--- a/PowerEditor/src/WinControls/Preference/preference.rc
+++ b/PowerEditor/src/WinControls/Preference/preference.rc
@@ -106,9 +106,11 @@ BEGIN
     CONTROL         "Update silently",IDC_CHECK_UPDATESILENTLY,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,24,78,98,10
     //GROUPBOX        "Backup Option",IDC_BACKUP_GB_STATIC,11,98,120,46,BS_CENTER
 
-    CONTROL         "Enable",IDC_CHECK__CLICKABLELINK_ENABLE,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,157,65,98,10
+    CONTROL         "Enable",IDC_CHECK_CLICKABLELINK_ENABLE,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,157,65,98,10
     GROUPBOX        "Clickable link setting",IDC_CLICKABLELINK_STATIC,144,54,150,39,BS_CENTER
-    CONTROL         "Don't draw underline",IDC_CHECK__CLICKABLELINK_NOUNDERLINE, "Button",BS_AUTOCHECKBOX | WS_TABSTOP,157,78,119,10
+    CONTROL         "Don't draw underline",IDC_CHECK_CLICKABLELINK_NOUNDERLINE, "Button",BS_AUTOCHECKBOX | WS_TABSTOP,157,78,119,10
+    EDITTEXT        IDC_EDIT_SESSIONFILEEXT,231,113,67,14,ES_AUTOHSCROLL
+    LTEXT           "Session file ext:",IDC_SESSIONFILEEXT_STATIC,233,101,66,8
 END
 
 IDD_PREFERENCE_NEWDOCSETTING_BOX DIALOGEX 0, 0, 305, 147
diff --git a/PowerEditor/src/WinControls/Preference/preferenceDlg.cpp b/PowerEditor/src/WinControls/Preference/preferenceDlg.cpp
index 5a8a77a99..0cbae7dce 100644
--- a/PowerEditor/src/WinControls/Preference/preferenceDlg.cpp
+++ b/PowerEditor/src/WinControls/Preference/preferenceDlg.cpp
@@ -489,9 +489,9 @@ BOOL CALLBACK SettingsDlg::run_dlgProc(UINT Message, WPARAM wParam, LPARAM lPara
 				dontUnderlineState = TRUE;	
 			}
 			
-			::SendDlgItemMessage(_hSelf, IDC_CHECK__CLICKABLELINK_ENABLE, BM_SETCHECK, linkEnable, 0);
-			::SendDlgItemMessage(_hSelf, IDC_CHECK__CLICKABLELINK_NOUNDERLINE, BM_SETCHECK, dontUnderline, 0);
-			::EnableWindow(::GetDlgItem(_hSelf, IDC_CHECK__CLICKABLELINK_NOUNDERLINE), dontUnderlineState);
+			::SendDlgItemMessage(_hSelf, IDC_CHECK_CLICKABLELINK_ENABLE, BM_SETCHECK, linkEnable, 0);
+			::SendDlgItemMessage(_hSelf, IDC_CHECK_CLICKABLELINK_NOUNDERLINE, BM_SETCHECK, dontUnderline, 0);
+			::EnableWindow(::GetDlgItem(_hSelf, IDC_CHECK_CLICKABLELINK_NOUNDERLINE), dontUnderlineState);
 
 			ETDTProc enableDlgTheme = (ETDTProc)pNppParam->getEnableThemeDlgTexture();
 			if (enableDlgTheme)
@@ -529,20 +529,20 @@ BOOL CALLBACK SettingsDlg::run_dlgProc(UINT Message, WPARAM wParam, LPARAM lPara
 				return TRUE;
 
 
-				case IDC_CHECK__CLICKABLELINK_ENABLE:
+				case IDC_CHECK_CLICKABLELINK_ENABLE:
 				{
-					bool isChecked = isCheckedOrNot(IDC_CHECK__CLICKABLELINK_ENABLE);
+					bool isChecked = isCheckedOrNot(IDC_CHECK_CLICKABLELINK_ENABLE);
 					if (!isChecked)
-						::SendDlgItemMessage(_hSelf, IDC_CHECK__CLICKABLELINK_NOUNDERLINE, BM_SETCHECK, BST_UNCHECKED, 0);
-					::EnableWindow(::GetDlgItem(_hSelf, IDC_CHECK__CLICKABLELINK_NOUNDERLINE), isChecked);
+						::SendDlgItemMessage(_hSelf, IDC_CHECK_CLICKABLELINK_NOUNDERLINE, BM_SETCHECK, BST_UNCHECKED, 0);
+					::EnableWindow(::GetDlgItem(_hSelf, IDC_CHECK_CLICKABLELINK_NOUNDERLINE), isChecked);
 					
 					nppGUI._styleURL = isChecked?2:0;
 				}
 				return TRUE;
 
-				case IDC_CHECK__CLICKABLELINK_NOUNDERLINE:
+				case IDC_CHECK_CLICKABLELINK_NOUNDERLINE:
 				{
-					bool isChecked = isCheckedOrNot(IDC_CHECK__CLICKABLELINK_NOUNDERLINE);
+					bool isChecked = isCheckedOrNot(IDC_CHECK_CLICKABLELINK_NOUNDERLINE);
 					nppGUI._styleURL = isChecked?1:2;
 				}
 				return TRUE;
diff --git a/PowerEditor/src/WinControls/Preference/preference_rc.h b/PowerEditor/src/WinControls/Preference/preference_rc.h
index 51c6697bf..9e604f9a4 100644
--- a/PowerEditor/src/WinControls/Preference/preference_rc.h
+++ b/PowerEditor/src/WinControls/Preference/preference_rc.h
@@ -80,8 +80,10 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 	#define	IDC_RADIO_BKSIMPLE (IDD_PREFERENCE_SETTING_BOX + 16)
 	#define	IDC_RADIO_BKVERBOSE (IDD_PREFERENCE_SETTING_BOX + 17)
 	#define	IDC_CLICKABLELINK_STATIC (IDD_PREFERENCE_SETTING_BOX + 18)
-	#define	IDC_CHECK__CLICKABLELINK_ENABLE (IDD_PREFERENCE_SETTING_BOX + 19)
-	#define	IDC_CHECK__CLICKABLELINK_NOUNDERLINE (IDD_PREFERENCE_SETTING_BOX + 20)
+	#define	IDC_CHECK_CLICKABLELINK_ENABLE (IDD_PREFERENCE_SETTING_BOX + 19)
+	#define	IDC_CHECK_CLICKABLELINK_NOUNDERLINE (IDD_PREFERENCE_SETTING_BOX + 20)
+	#define	IDC_EDIT_SESSIONFILEEXT (IDD_PREFERENCE_SETTING_BOX + 21)
+	#define	IDC_SESSIONFILEEXT_STATIC (IDD_PREFERENCE_SETTING_BOX + 22)
 	
 #define	IDD_PREFERENCE_NEWDOCSETTING_BOX 6400 //(IDD_PREFERENCE_BOX + 400)
 	#define	IDC_FORMAT_GB_STATIC (IDD_PREFERENCE_NEWDOCSETTING_BOX + 1)
diff --git a/PowerEditor/visual.net/notepadPlus.vcproj b/PowerEditor/visual.net/notepadPlus.vcproj
index 015febaef..f37281e50 100644
--- a/PowerEditor/visual.net/notepadPlus.vcproj
+++ b/PowerEditor/visual.net/notepadPlus.vcproj
@@ -576,6 +576,10 @@
 				RelativePath="..\src\resource.h"
 				>
 			</File>
+			<File
+				RelativePath="..\src\WinControls\Preference\resource.h"
+				>
+			</File>
 			<File
 				RelativePath="..\src\WinControls\StaticDialog\RunDlg\RunDlg.h"
 				>