diff --git a/RedPandaIDE/cpprefacter.cpp b/RedPandaIDE/cpprefacter.cpp
index a1361177..abd259fc 100644
--- a/RedPandaIDE/cpprefacter.cpp
+++ b/RedPandaIDE/cpprefacter.cpp
@@ -63,8 +63,7 @@ PSearchResultTreeItem CppRefacter::findOccurenceInFile(
         editor.lines()->setContents(buffer);
     } else {
         QByteArray encoding;
-        QFile file(filename);
-        editor.lines()->LoadFromFile(file,ENCODING_AUTO_DETECT,encoding);
+        editor.lines()->LoadFromFile(filename,ENCODING_AUTO_DETECT,encoding);
     }
     editor.setHighlighter(HighlighterManager().getCppHighlighter());
     int posY = 0;
diff --git a/RedPandaIDE/editor.cpp b/RedPandaIDE/editor.cpp
index af2ef766..20807ea2 100644
--- a/RedPandaIDE/editor.cpp
+++ b/RedPandaIDE/editor.cpp
@@ -152,11 +152,9 @@ Editor::~Editor() {
 
 void Editor::loadFile(const QString& filename) {
     if (filename.isEmpty()) {
-        QFile file(mFilename);
-        this->lines()->LoadFromFile(file,mEncodingOption,mFileEncoding);
+        this->lines()->LoadFromFile(mFilename,mEncodingOption,mFileEncoding);
     } else {
-        QFile file(filename);
-        this->lines()->LoadFromFile(file,mEncodingOption,mFileEncoding);
+        this->lines()->LoadFromFile(filename,mEncodingOption,mFileEncoding);
     }
     //this->setModified(false);
     updateCaption();
@@ -300,7 +298,6 @@ bool Editor::saveAs(const QString &name, bool fromProject){
         mUseCppSyntax = pSettings->editor().defaultFileCpp();
     }
 
-
     //update (reassign highlighter)
     PSynHighlighter newHighlighter = HighlighterManager().getHighlighter(mFilename);
     if (newHighlighter) {
diff --git a/RedPandaIDE/project.cpp b/RedPandaIDE/project.cpp
index 81cf86f9..0cb6183b 100644
--- a/RedPandaIDE/project.cpp
+++ b/RedPandaIDE/project.cpp
@@ -15,6 +15,7 @@
 #include <QFileInfo>
 #include <QMessageBox>
 #include <QTextCodec>
+#include <QMessageBox>
 #include "settings.h"
 #include <QDebug>
 
@@ -644,6 +645,7 @@ bool Project::assignTemplate(const std::shared_ptr<ProjectTemplate> aTemplate)
                 s = templateUnit->CText;
                 unit = newUnit(mNode,templateUnit->CName);
             }
+
             Editor * editor = pMainWindow->editorList()->newEditor(
                         QDir(directory()).absoluteFilePath(unit->fileName()),
                         unit->encoding(),
@@ -651,7 +653,7 @@ bool Project::assignTemplate(const std::shared_ptr<ProjectTemplate> aTemplate)
                         true);
 
             QString s2 = QDir(pSettings->dirs().templateDir()).absoluteFilePath(s);
-            if (QFile(s2).exists()) {
+            if (fileExists(s2)) {
                 editor->loadFile(s2);
             } else {
                 s.replace("#13#10","\r\n");
diff --git a/RedPandaIDE/qsynedit/SynEdit.cpp b/RedPandaIDE/qsynedit/SynEdit.cpp
index 6c5ee13c..542e8bc6 100644
--- a/RedPandaIDE/qsynedit/SynEdit.cpp
+++ b/RedPandaIDE/qsynedit/SynEdit.cpp
@@ -17,6 +17,7 @@
 #include <QPaintEvent>
 #include <QResizeEvent>
 #include <QStyleHints>
+#include <QMessageBox>
 
 SynEdit::SynEdit(QWidget *parent) : QAbstractScrollArea(parent)
 {
@@ -454,7 +455,7 @@ BufferCoord SynEdit::getMatchingBracketEx(BufferCoord APoint)
                 // search for the matching bracket (that is until NumBrackets = 0)
                 NumBrackets = 1;
                 if (i%2==1) {
-                    do {
+                    while (true) {
                         // search until start of line
                         while (PosX > 1) {
                             PosX--;
@@ -486,9 +487,9 @@ BufferCoord SynEdit::getMatchingBracketEx(BufferCoord APoint)
                         PosY--;
                         Line = mLines->getString(PosY - 1);
                         PosX = Line.length() + 1;
-                    } while (true);
+                    }
                 } else {
-                    do {
+                    while (true) {
                         // search until end of line
                         Len = Line.length();
                         while (PosX < Len) {
@@ -521,7 +522,7 @@ BufferCoord SynEdit::getMatchingBracketEx(BufferCoord APoint)
                         PosY++;
                         Line = mLines->getString(PosY - 1);
                         PosX = 0;
-                    } while (true);
+                    }
                 }
                 // don't test the other brackets, we're done
                 break;
@@ -2810,6 +2811,8 @@ int SynEdit::scanFrom(int Index, int canStopIndex)
         Result ++ ;
     } while (Result < mLines->count());
     Result--;
+    if (mUseCodeFolding)
+        rescan();
     return Result;
 }
 
@@ -2825,6 +2828,8 @@ void SynEdit::scanRanges()
                              mHighlighter->getRightBraces());
         }
     }
+    if (mUseCodeFolding)
+        rescan();
 }
 
 void SynEdit::uncollapse(PSynEditFoldRange FoldRange)
@@ -2914,6 +2919,7 @@ void SynEdit::rescanForFoldRanges()
 
     // Did we leave any collapsed folds and are we viewing a code file?
     if (mAllFoldRanges.count() > 0) {
+
         // Add folds to a separate list
         PSynEditFoldRanges TemporaryAllFoldRanges = std::make_shared<SynEditFoldRanges>();
         scanForFoldRanges(TemporaryAllFoldRanges);
@@ -2932,6 +2938,7 @@ void SynEdit::rescanForFoldRanges()
         }
 
     } else {
+
         // We ended up with no folds after deleting, just pass standard data...
         PSynEditFoldRanges temp(&mAllFoldRanges, null_deleter);
         scanForFoldRanges(temp);
@@ -2941,10 +2948,10 @@ void SynEdit::rescanForFoldRanges()
 void SynEdit::scanForFoldRanges(PSynEditFoldRanges TopFoldRanges)
 {
     PSynEditFoldRanges parentFoldRanges = TopFoldRanges;
-      // Recursively scan for folds (all types)
-      for (int i= 0 ; i< mCodeFolding.foldRegions.count() ; i++ ) {
-          findSubFoldRange(TopFoldRanges, i,parentFoldRanges,PSynEditFoldRange());
-      }
+    // Recursively scan for folds (all types)
+    for (int i= 0 ; i< mCodeFolding.foldRegions.count() ; i++ ) {
+        findSubFoldRange(TopFoldRanges, i,parentFoldRanges,PSynEditFoldRange());
+    }
 }
 
 //this func should only be used in findSubFoldRange
@@ -2982,11 +2989,11 @@ void SynEdit::findSubFoldRange(PSynEditFoldRanges TopFoldRanges, int FoldIndex,P
     PSynEditFoldRange  CollapsedFold;
     int Line = 0;
     QString CurLine;
+    if (!mHighlighter)
+        return;
     bool useBraces = ( mCodeFolding.foldRegions.get(FoldIndex)->openSymbol == "{"
             && mCodeFolding.foldRegions.get(FoldIndex)->closeSymbol == "}");
 
-    if (!mHighlighter)
-        return;
     while (Line < mLines->count()) { // index is valid for LinesToScan and fLines
         // If there is a collapsed fold over here, skip it
         CollapsedFold = collapsedFoldStartAtLine(Line + 1); // only collapsed folds remain
@@ -4075,7 +4082,6 @@ void SynEdit::setUseCodeFolding(bool value)
 {
     if (mUseCodeFolding!=value) {
         mUseCodeFolding = value;
-        rescan();
     }
 }
 
@@ -5659,8 +5665,6 @@ void SynEdit::onLinesChanged()
 {
     SynSelectionMode vOldMode;
     mStateFlags.setFlag(SynStateFlag::sfLinesChanging, false);
-    if (mUseCodeFolding)
-        rescan();
 
     updateScrollbars();
     vOldMode = mActiveSelectionMode;
@@ -5671,7 +5675,6 @@ void SynEdit::onLinesChanged()
     else
         invalidateRect(mInvalidateRect);
     mInvalidateRect = {0,0,0,0};
-
     if (mGutter.showLineNumbers() && (mGutter.autoSize()))
         mGutter.autoSizeDigitCount(mLines->count());
     //if (!mOptions.testFlag(SynEditorOption::eoScrollPastEof))
diff --git a/RedPandaIDE/qsynedit/TextBuffer.cpp b/RedPandaIDE/qsynedit/TextBuffer.cpp
index 0e20f76f..78e6f0a8 100644
--- a/RedPandaIDE/qsynedit/TextBuffer.cpp
+++ b/RedPandaIDE/qsynedit/TextBuffer.cpp
@@ -7,6 +7,7 @@
 #include "SynEdit.h"
 #include "../utils.h"
 #include "../platform.h"
+#include <QMessageBox>
 
 SynEditStringList::SynEditStringList(SynEdit *pEdit, QObject *parent):
       QObject(parent),
@@ -477,15 +478,15 @@ void SynEditStringList::InsertText(int Index, const QString &NewText)
     InsertStrings(Index,lines);
 }
 
-void SynEditStringList::LoadFromFile(QFile &file, const QByteArray& encoding, QByteArray& realEncoding)
+void SynEditStringList::LoadFromFile(const QString& filename, const QByteArray& encoding, QByteArray& realEncoding)
 {
-    if (!file.open(QFile::ReadOnly))
+    QFile file(filename);
+    if (!file.open(QFile::ReadOnly ))
         throw FileError(tr("Can't open file '%1' for read!").arg(file.fileName()));
     beginUpdate();
     auto action = finally([this]{
         endUpdate();
     });
-
     //test for utf8 / utf 8 bom
     if (encoding == ENCODING_AUTO_DETECT) {
         if (file.atEnd()) {
@@ -514,7 +515,7 @@ void SynEditStringList::LoadFromFile(QFile &file, const QByteArray& encoding, QB
             mFileEndingType = FileEndingType::Mac;
         }
         clear();
-        do {
+        while (true) {
             if (allAscii) {
                 allAscii = isTextAllAscii(line);
             }
@@ -532,7 +533,8 @@ void SynEditStringList::LoadFromFile(QFile &file, const QByteArray& encoding, QB
                 break;
             }
             line = file.readLine();
-        } while (true);
+        }
+        emit inserted(0,mList.count());
         if (!needReread) {
             if (allAscii)
                 realEncoding = ENCODING_ASCII;
@@ -545,15 +547,6 @@ void SynEditStringList::LoadFromFile(QFile &file, const QByteArray& encoding, QB
 
     if (realEncoding == ENCODING_SYSTEM_DEFAULT) {
         realEncoding = getDefaultSystemEncoding();
-        QFile file("f:\\test.txt");
-        if (file.open(QFile::WriteOnly|QFile::Truncate)) {
-            file.write("----test----\n");
-            for (QByteArray a:QTextCodec::codecForLocale()->aliases()) {
-                file.write(a);
-                file.write("\n");
-            }
-            file.close();
-        }
     }
     file.reset();
     QTextStream textStream(&file);
@@ -569,6 +562,7 @@ void SynEditStringList::LoadFromFile(QFile &file, const QByteArray& encoding, QB
     while (textStream.readLineInto(&line)) {
         addItem(TrimRight(line));
     }
+    emit inserted(0,mList.count());
 }
 
 
diff --git a/RedPandaIDE/qsynedit/TextBuffer.h b/RedPandaIDE/qsynedit/TextBuffer.h
index 8304ada3..fe48d9a8 100644
--- a/RedPandaIDE/qsynedit/TextBuffer.h
+++ b/RedPandaIDE/qsynedit/TextBuffer.h
@@ -86,7 +86,7 @@ public:
     void InsertLines(int Index, int NumLines);
     void InsertStrings(int Index, const QStringList& NewStrings);
     void InsertText(int Index,const QString& NewText);
-    void LoadFromFile(QFile& file, const QByteArray& encoding, QByteArray& realEncoding);
+    void LoadFromFile(const QString& filename, const QByteArray& encoding, QByteArray& realEncoding);
     void SaveToFile(QFile& file, const QByteArray& encoding, QByteArray& realEncoding);
 
     bool getAppendNewLineAtEOF() const;
diff --git a/RedPandaIDE/systemconsts.h b/RedPandaIDE/systemconsts.h
index 3dddfe98..a4bd4382 100644
--- a/RedPandaIDE/systemconsts.h
+++ b/RedPandaIDE/systemconsts.h
@@ -50,7 +50,7 @@
 #error "Only support windows and linux now!"
 #endif
 
-#define DEVCPP_VERSION "0.1.0"
+#define DEVCPP_VERSION "0.2.0"
 
 class SystemConsts
 {
diff --git a/RedPandaIDE/utils.cpp b/RedPandaIDE/utils.cpp
index a53e7e61..205817a0 100644
--- a/RedPandaIDE/utils.cpp
+++ b/RedPandaIDE/utils.cpp
@@ -66,6 +66,15 @@ const QByteArray GuessTextEncoding(const QByteArray& text){
     return ENCODING_UTF8;
 }
 
+bool isTextAllAscii(const QByteArray& text) {
+    for (char c:text) {
+        if (c<0 || c>127) {
+            return false;
+        }
+    }
+    return true;
+}
+
 bool isTextAllAscii(const QString& text) {
     for (QChar c:text) {
         if (c.unicode()>127) {
diff --git a/RedPandaIDE/utils.h b/RedPandaIDE/utils.h
index 7596d414..3ece7743 100644
--- a/RedPandaIDE/utils.h
+++ b/RedPandaIDE/utils.h
@@ -114,6 +114,7 @@ bool isGreenEdition();
 
 const QByteArray GuessTextEncoding(const QByteArray& text);
 
+bool isTextAllAscii(const QByteArray& text);
 bool isTextAllAscii(const QString& text);
 
 QByteArray runAndGetOutput(const QString& cmd, const QString& workingDir, const QStringList& arguments,