diff --git a/NEWS.md b/NEWS.md
index a1fbb23a..4c0eaf76 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -17,6 +17,10 @@ Red Panda C++ Version 0.13.2
   - fix: caret dispears when at '\t' under Windows  7
   - enhancement: ctrl+up/down scrolls in the editor
   - enhancement: add "wrap around" option to find/replace
+  - fix: project's icon setting is not correctly saved
+  - fix: project's type setting won't be saved
+  - fix: If project's compiler set is not the same with the default compiler set, auto openned project's file will use wrong compiler set to do syntax check.
+  - fix: open a project file through "File"->"Open" will not correctly connect it with the project internally
 
 Red Panda C++ Version 0.13.1
  - enhancement: suppoort localization info in project templates
diff --git a/RedPandaIDE/mainwindow.cpp b/RedPandaIDE/mainwindow.cpp
index 5887da2a..cae2e734 100644
--- a/RedPandaIDE/mainwindow.cpp
+++ b/RedPandaIDE/mainwindow.cpp
@@ -975,8 +975,9 @@ void MainWindow::openFile(const QString &filename, QTabWidget* page)
     }
     try {
         pSettings->history().removeFile(filename);
+        bool inProject = (mProject && mProject->isProjectUnit(filename));
         editor = mEditorList->newEditor(filename,ENCODING_AUTO_DETECT,
-                                        false, false, page);
+                                        inProject, false, page);
         editor->activate();
         this->updateForEncodingInfo();
     } catch (FileError e) {
@@ -984,7 +985,7 @@ void MainWindow::openFile(const QString &filename, QTabWidget* page)
     }
 }
 
-void MainWindow::openProject(const QString &filename)
+void MainWindow::openProject(const QString &filename, bool openFiles)
 {
     if (!fileExists(filename)) {
         return;
@@ -1029,13 +1030,12 @@ void MainWindow::openProject(const QString &filename)
     //  if not devData.ShowLeftPages then
     //    actProjectManager.Execute;
             //checkForDllProfiling();
-        updateAppTitle();
-        updateCompilerSet();
 
         //parse the project
         //  UpdateClassBrowsing;
         scanActiveProject(true);
-        mProject->doAutoOpen();
+        if (openFiles)
+            mProject->doAutoOpen();
 
         //update editor's inproject flag
         for (int i=0;i<mProject->units().count();i++) {
@@ -1054,6 +1054,8 @@ void MainWindow::openProject(const QString &filename)
         if (e) {
             checkSyntaxInBack(e);
         }
+        updateAppTitle();
+        updateCompilerSet();
         updateClassBrowserForEditor(e);
     }
     updateForEncodingInfo();
@@ -1985,8 +1987,12 @@ void MainWindow::loadLastOpens()
                               QMessageBox::Ok);
         return;
     }
-    Editor *  focusedEditor = nullptr;
+    QString projectFilename = QString::fromLocal8Bit((lastOpenIni.GetValue("LastOpens", "Project","")));
     int count = lastOpenIni.GetLongValue("LastOpens","Count",0);
+    if (fileExists(projectFilename)) {
+        openProject(projectFilename, false);
+    }
+    Editor *  focusedEditor = nullptr;
     for (int i=0;i<count;i++) {
         QByteArray sectionName = QString("Editor_%1").arg(i).toLocal8Bit();
         QString editorFilename = QString::fromLocal8Bit(lastOpenIni.GetValue(sectionName,"FileName",""));
@@ -1999,7 +2005,8 @@ void MainWindow::loadLastOpens()
             page = mEditorList->leftPageWidget();
         else
             page = mEditorList->rightPageWidget();
-        Editor * editor = mEditorList->newEditor(editorFilename,ENCODING_AUTO_DETECT,false,false,page);
+        bool inProject = (mProject && mProject->isProjectUnit(editorFilename));
+        Editor * editor = mEditorList->newEditor(editorFilename,ENCODING_AUTO_DETECT,inProject,false,page);
         if (!editor)
             continue;
         BufferCoord pos;
@@ -2016,10 +2023,7 @@ void MainWindow::loadLastOpens()
             focusedEditor = editor;
         pSettings->history().removeFile(editorFilename);
     }
-    QString projectFilename = QString::fromLocal8Bit((lastOpenIni.GetValue("LastOpens", "Project","")));
-    if (fileExists(projectFilename)) {
-        openProject(projectFilename);
-    } else {
+    if (count>0) {
         updateEditorActions();
         updateForEncodingInfo();
     }
diff --git a/RedPandaIDE/mainwindow.h b/RedPandaIDE/mainwindow.h
index afb60dc3..d0c7d868 100644
--- a/RedPandaIDE/mainwindow.h
+++ b/RedPandaIDE/mainwindow.h
@@ -177,7 +177,7 @@ public:
     const PBookmarkModel &bookmarkModel() const;
 
     void openFile(const QString& filename, QTabWidget* page=nullptr);
-    void openProject(const QString& filename);
+    void openProject(const QString& filename, bool openFiles = true);
     void changeOptions(const QString& widgetName=QString(), const QString& groupName=QString());
 
     bool openningFiles() const;
diff --git a/RedPandaIDE/project.cpp b/RedPandaIDE/project.cpp
index dcc2619d..d2cd6b8e 100644
--- a/RedPandaIDE/project.cpp
+++ b/RedPandaIDE/project.cpp
@@ -564,6 +564,15 @@ bool Project::saveUnits()
     return true;
 }
 
+bool Project::isProjectUnit(const QString &filename)
+{
+    foreach(const PProjectUnit& unit, mUnits) {
+        if (QString::compare(unit->fileName(),filename, PATH_SENSITIVITY)==0)
+            return true;
+    }
+    return false;
+}
+
 void Project::setCompilerOption(const QString &optionString, char value)
 {
     if (mOptions.compilerSet<0 || mOptions.compilerSet>=pSettings->compilerSets().size()) {
@@ -1211,20 +1220,6 @@ void Project::createFolderNodes()
 
 void Project::doAutoOpen()
 {
-    //todo:
-//    case devData.AutoOpen of
-//      0: begin
-//          for i := 0 to pred(fUnits.Count) do
-//            OpenUnit(i); // Open all
-//          if fUnits.Count > 0 then
-//            fUnits[0].Editor.Activate; // Show first
-//        end;
-//      1:
-//        if fUnits.Count > 0 then
-//          OpenUnit(0).Activate; // Open and show first
-//      2:
-//        LoadLayout; // Open previous selection
-//    end;
     loadLayout();
 }
 
diff --git a/RedPandaIDE/project.h b/RedPandaIDE/project.h
index 3d833e38..6ade7f3c 100644
--- a/RedPandaIDE/project.h
+++ b/RedPandaIDE/project.h
@@ -184,6 +184,7 @@ public:
     void saveUnitAs(int i, const QString& sFileName, bool syncEditor = true); // save single [UnitX]
     void saveUnitLayout(Editor* e, int index); // save single [UnitX] cursor positions
     bool saveUnits();
+    bool isProjectUnit(const QString& filename);
     void setCompilerOption(const QString& optionString, char value);
     void sortUnitsByPriority();
     void sortUnitsByAlpha();
diff --git a/RedPandaIDE/settingsdialog/projectgeneralwidget.cpp b/RedPandaIDE/settingsdialog/projectgeneralwidget.cpp
index d12748d2..8a1e7795 100644
--- a/RedPandaIDE/settingsdialog/projectgeneralwidget.cpp
+++ b/RedPandaIDE/settingsdialog/projectgeneralwidget.cpp
@@ -42,7 +42,7 @@ ProjectGeneralWidget::~ProjectGeneralWidget()
 void ProjectGeneralWidget::refreshIcon()
 {
     QPixmap icon(mIconPath);
-    ui->lblICon->setPixmap(icon);
+    ui->lbIcon->setPixmap(icon);
 }
 
 void ProjectGeneralWidget::doLoad()
@@ -103,23 +103,25 @@ void ProjectGeneralWidget::doSave()
     project->options().useGPP = ui->cbDefaultCpp->isChecked();
     project->options().supportXPThemes = ui->cbSupportXPTheme->isChecked();
     if (mIconPath.isEmpty()
-            || !ui->lblICon->pixmap() || ui->lblICon->pixmap()->isNull()) {
+            || !ui->lbIcon->pixmap() || ui->lbIcon->pixmap()->isNull()) {
         project->options().icon = "";
     } else {
         QString iconPath = changeFileExt(project->filename(),"ico");
-        if (QFile(iconPath).exists()) {
-            if (!QFile::remove(iconPath)) {
-                QMessageBox::critical(this,
-                                      tr("Can't remove old icon file"),
-                                      tr("Can't remove old icon file '%1'")
-                                      .arg(iconPath),
-                                      QMessageBox::Ok);
+        if (iconPath!=mIconPath) {
+            if (QFile(iconPath).exists()) {
+                if (!QFile::remove(iconPath)) {
+                    QMessageBox::critical(this,
+                                          tr("Can't remove old icon file"),
+                                          tr("Can't remove old icon file '%1'")
+                                          .arg(iconPath),
+                                          QMessageBox::Ok);
+                }
             }
+            QFile::copy(mIconPath, iconPath);
+            project->options().icon = iconPath;
+            mIconPath = iconPath;
+            refreshIcon();
         }
-        QFile::copy(mIconPath, iconPath);
-        project->options().icon = iconPath;
-        mIconPath = iconPath;
-        refreshIcon();
     }
 
     project->saveOptions();
@@ -130,7 +132,7 @@ void ProjectGeneralWidget::on_btnBrowse_clicked()
     QString fileName = QFileDialog::getOpenFileName(this,
                                                     tr("Select icon file"),
                                                     pSettings->dirs().appDir(),
-                                                    tr("Icon Files (*.ico)"));
+                                                    tr("Image Files (*.ico *.png *.jpg)"));
     if (!fileName.isEmpty()) {
         mIconPath = fileName;
         QPixmap icon(mIconPath);
@@ -144,7 +146,7 @@ void ProjectGeneralWidget::on_btnBrowse_clicked()
 void ProjectGeneralWidget::on_btnRemove_clicked()
 {
     mIconPath = "";
-    ui->lblICon->setPixmap(QPixmap());
+    ui->lbIcon->setPixmap(QPixmap());
     ui->btnRemove->setEnabled(!mIconPath.isEmpty());
     setSettingsChanged();
 }
diff --git a/RedPandaIDE/settingsdialog/projectgeneralwidget.ui b/RedPandaIDE/settingsdialog/projectgeneralwidget.ui
index 2369ca5f..889b4c56 100644
--- a/RedPandaIDE/settingsdialog/projectgeneralwidget.ui
+++ b/RedPandaIDE/settingsdialog/projectgeneralwidget.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>685</width>
+    <width>687</width>
     <height>639</height>
    </rect>
   </property>
@@ -114,7 +114,7 @@
              </spacer>
             </item>
             <item>
-             <widget class="QLabel" name="lblICon">
+             <widget class="QLabel" name="lbIcon">
               <property name="minimumSize">
                <size>
                 <width>128</width>
diff --git a/RedPandaIDE/settingsdialog/settingswidget.cpp b/RedPandaIDE/settingsdialog/settingswidget.cpp
index 72979f30..2d52e912 100644
--- a/RedPandaIDE/settingsdialog/settingswidget.cpp
+++ b/RedPandaIDE/settingsdialog/settingswidget.cpp
@@ -24,6 +24,7 @@
 #include <QListView>
 #include <QMessageBox>
 #include <QPlainTextEdit>
+#include <QListWidget>
 #include <QRadioButton>
 #include <QSpinBox>
 #include "../widgets/coloredit.h"
@@ -121,6 +122,9 @@ void SettingsWidget::connectInputs()
     for (QAbstractItemView* p: findChildren<QAbstractItemView*>()) {
         connectAbstractItemView(p);
     }
+    for (QListWidget* p:findChildren<QListWidget*>()) {
+        connect(p, QOverload<int>::of(&QListWidget::currentRowChanged) ,this, &SettingsWidget::setSettingsChanged);
+    }
     for (QGroupBox* p: findChildren<QGroupBox*>()) {
         connect(p, &QGroupBox::toggled,this, &SettingsWidget::setSettingsChanged);
     }
@@ -135,15 +139,32 @@ void SettingsWidget::disconnectInputs()
     for (QCheckBox* p:findChildren<QCheckBox*>()) {
         disconnect(p, &QCheckBox::stateChanged, this, &SettingsWidget::setSettingsChanged);
     }
+    for (QRadioButton* p:findChildren<QRadioButton*>()) {
+        disconnect(p, &QRadioButton::toggled, this, &SettingsWidget::setSettingsChanged);
+    }
     for (QPlainTextEdit* p:findChildren<QPlainTextEdit*>()) {
         disconnect(p, &QPlainTextEdit::textChanged, this, &SettingsWidget::setSettingsChanged);
     }
+    for (QSpinBox* p:findChildren<QSpinBox*>()) {
+        disconnect(p, QOverload<int>::of(&QSpinBox::valueChanged), this, &SettingsWidget::setSettingsChanged);
+    }
+    for (ColorEdit* p:findChildren<ColorEdit*>()) {
+        disconnect(p, &ColorEdit::colorChanged, this, &SettingsWidget::setSettingsChanged);
+    }
+
     for (QComboBox* p: findChildren<QComboBox*>()) {
         disconnect(p, QOverload<int>::of(&QComboBox::currentIndexChanged) ,this, &SettingsWidget::setSettingsChanged);
     }
     for (QAbstractItemView* p: findChildren<QAbstractItemView*>()) {
         disconnectAbstractItemView(p);
     }
+    for (QListWidget* p:findChildren<QListWidget*>()) {
+        disconnect(p, QOverload<int>::of(&QListWidget::currentRowChanged) ,this, &SettingsWidget::setSettingsChanged);
+    }
+    for (QGroupBox* p: findChildren<QGroupBox*>()) {
+        disconnect(p, &QGroupBox::toggled,this, &SettingsWidget::setSettingsChanged);
+    }
+
 }
 
 const QString &SettingsWidget::group()