diff --git a/source/app/InputStream.cpp b/source/app/InputStream.cpp
index ba9ea75..6cd67ec 100755
--- a/source/app/InputStream.cpp
+++ b/source/app/InputStream.cpp
@@ -399,6 +399,8 @@ cv::Mat InputStream::getFrameCvMat()
 
 Void InputStream::seekInput( UInt64 new_frame_num )
 {
+  if( !m_pFile )
+    return;
   if( new_frame_num < 0 || new_frame_num >= m_uiTotalFrameNum )
     return;
 #ifdef USE_FFMPEG
diff --git a/source/app/ModulesHandle.cpp b/source/app/ModulesHandle.cpp
index f6e56a2..ecd54e5 100644
--- a/source/app/ModulesHandle.cpp
+++ b/source/app/ModulesHandle.cpp
@@ -49,7 +49,7 @@ ModulesHandle::ModulesHandle( QWidget * parent )
   setParent( m_pcParent );
   m_uiModulesCount = 0;
   m_uiModuleSelected = -1;
-
+  m_bShowModulesNewWindow = false;
   ModulesList( true );
 }
 
@@ -68,42 +68,31 @@ void ModulesHandle::selectModule( int index )
   m_uiModuleSelected = index;
 }
 
-PlaYUVerModuleIf* ModulesHandle::getSelectedModuleIf()
-{
-  PlaYUVerModuleIf* currModuleIf = NULL;
-
-  if( m_uiModuleSelected >= 0 )
-    //if( m_arrayModulesActions.at(m_uiModuleSelected)->isChecked() )
-    currModuleIf = m_pcPlaYUVerModules.at( m_uiModuleSelected );
-
-  m_uiModuleSelected = -1;
-  return currModuleIf;
-}
-
 SubWindowHandle* ModulesHandle::toggleSelectedModuleIf( SubWindowHandle* pcSubWindow )
 {
   SubWindowHandle* interfaceChild = NULL;
   PlaYUVerModuleIf* currModuleIf = NULL;
 
   if( m_uiModuleSelected >= 0 )
-    //if( m_arrayModulesActions.at(m_uiModuleSelected)->isChecked() )
     currModuleIf = m_pcPlaYUVerModules.at( m_uiModuleSelected );
   m_uiModuleSelected = -1;
 
   if( currModuleIf->m_pcAction->isChecked() )
   {
-    if( currModuleIf->m_cModuleDef.m_bRequiresNewWindow )
+    currModuleIf->m_pcDisplaySubWindow = NULL;
+    if( currModuleIf->m_cModuleDef.m_bRequiresNewWindow || m_bShowModulesNewWindow )
     {
+      QString windowName;
       interfaceChild = new SubWindowHandle( m_pcParent );
-      //mdiArea->addSubWindow( interfaceChild );
-
       pcSubWindow->setModuleSubWindow( interfaceChild );
       pcSubWindow->enableModule( currModuleIf );
-
-      interfaceChild->show();
-      interfaceChild->zoomToFit();
+      windowName.append( pcSubWindow->userFriendlyCurrentFile() );
+      windowName.append( " - " );
+      windowName.append( currModuleIf->m_cModuleDef.m_pchModuleName );
+      interfaceChild->setWindowName( windowName );
       connect( interfaceChild->getViewArea(), SIGNAL( positionChanged(const QPoint &, PlaYUVerFrame *) ), this,
           SLOT( updatePixelValueStatusBar(const QPoint &, PlaYUVerFrame *) ) );
+      currModuleIf->m_pcDisplaySubWindow = interfaceChild;
     }
     else
     {
@@ -114,11 +103,22 @@ SubWindowHandle* ModulesHandle::toggleSelectedModuleIf( SubWindowHandle* pcSubWi
   else
   {
     currModuleIf->m_pcSubWindow->disableModule();
-    currModuleIf->m_pcSubWindow = NULL;
   }
   return interfaceChild;
 }
 
+Void ModulesHandle::destroyModuleIf( PlaYUVerModuleIf* pcCurrModuleIf )
+{
+  pcCurrModuleIf->m_pcAction->setChecked( false );
+  if( pcCurrModuleIf->m_pcDisplaySubWindow )
+  {
+    pcCurrModuleIf->m_pcDisplaySubWindow->close();
+    pcCurrModuleIf->m_pcDisplaySubWindow = NULL;
+  }
+  pcCurrModuleIf->m_pcSubWindow = NULL;
+  pcCurrModuleIf->destroy();
+}
+
 QMenu* ModulesHandle::createMenus( QMenuBar *MainAppMenuBar )
 {
   PlaYUVerModuleIf* currModuleIf;
diff --git a/source/app/ModulesHandle.h b/source/app/ModulesHandle.h
index 4f5f554..528eaa6 100644
--- a/source/app/ModulesHandle.h
+++ b/source/app/ModulesHandle.h
@@ -53,12 +53,13 @@ public:
 
   QMenu* createMenus( QMenuBar *MainAppMenuBar );
   Void updateMenus( Bool hasSubWindow );
-  PlaYUVerModuleIf* getSelectedModuleIf();
   SubWindowHandle* toggleSelectedModuleIf( SubWindowHandle* pcSubWindow );
+  static Void destroyModuleIf( PlaYUVerModuleIf* pcCurrModuleIf );
 
 private:
   QWidget *m_pcParent;
 
+  Bool m_bShowModulesNewWindow;
   UInt m_uiModulesCount;
   Int m_uiModuleSelected;
   QMenu* m_pcModulesMenu;
diff --git a/source/app/PlaYUVerModuleIf.h b/source/app/PlaYUVerModuleIf.h
index a7d1132..f3d74cc 100644
--- a/source/app/PlaYUVerModuleIf.h
+++ b/source/app/PlaYUVerModuleIf.h
@@ -77,6 +77,12 @@ class SubWindowHandle;
 
 class PlaYUVerModuleIf
 {
+  friend class ModulesHandle;
+private:
+  QAction* m_pcAction;
+  SubWindowHandle* m_pcSubWindow;
+  SubWindowHandle* m_pcDisplaySubWindow;
+
 public:
   PlaYUVerModuleIf()
   {
@@ -86,8 +92,6 @@ public:
   {
   }
 
-  QAction* m_pcAction;
-  SubWindowHandle* m_pcSubWindow;
   PlaYUVerModuleDefinition m_cModuleDef;
 
   virtual Void create() {};
diff --git a/source/app/SubWindowHandle.cpp b/source/app/SubWindowHandle.cpp
index 4b32fc1..1051cdf 100644
--- a/source/app/SubWindowHandle.cpp
+++ b/source/app/SubWindowHandle.cpp
@@ -52,8 +52,9 @@ SubWindowHandle::SubWindowHandle( QWidget * parent ) :
   m_cScrollArea->setWidget( m_cViewArea );
   m_cScrollArea->setWidgetResizable( true );
 
+  m_pCurrStream = NULL;
   m_pCurrStream = new InputStream;
-
+  m_pcCurrFrame = NULL;
   m_pcCurrentModule = NULL;
   m_pcModuleSubWindow = NULL;
 
@@ -64,15 +65,11 @@ SubWindowHandle::SubWindowHandle( QWidget * parent ) :
 
 SubWindowHandle::~SubWindowHandle()
 {
+  disableModule();
   delete m_cViewArea;
   delete m_cScrollArea;
-  delete m_pCurrStream;
-  if( m_pcCurrentModule )
-  {
-    m_pcCurrentModule->m_pcAction->setChecked( false );
-    m_pcCurrentModule->destroy();
-    m_pcCurrentModule = NULL;
-  }
+  if( m_pCurrStream )
+    delete m_pCurrStream;
 }
 
 Bool SubWindowHandle::loadFile( const QString &fileName )
@@ -80,6 +77,9 @@ Bool SubWindowHandle::loadFile( const QString &fileName )
   UInt Width = 0, Height = 0, FrameRate = 30;
   Int InputFormat = -1;
 
+  if( !m_pCurrStream )
+    m_pCurrStream = new InputStream;
+
   m_pCurrStream->getFormat( Width, Height, InputFormat, FrameRate );
 
   if( m_pCurrStream->guessFormat( fileName, Width, Height, InputFormat, FrameRate ) )
@@ -102,7 +102,6 @@ Bool SubWindowHandle::loadFile( const QString &fileName )
   QApplication::restoreOverrideCursor();
 
   refreshFrame();
-  //normalSize();
 
   m_cCurrFileName = fileName;
   m_cWindowName = m_pCurrStream->getStreamInformationString();
@@ -116,11 +115,6 @@ Bool SubWindowHandle::loadFile( const QString &fileName )
  */
 Void SubWindowHandle::enableModule( PlaYUVerModuleIf* select_module )
 {
-  if( m_pcCurrentModule == select_module )
-  {
-    disableModule();
-    return;
-  }
   m_pcCurrentModule = select_module;
   m_pcCurrentModule->create( m_pCurrStream->getCurrFrame() );
   refreshFrame();
@@ -130,10 +124,9 @@ Void SubWindowHandle::disableModule()
 {
   if( !m_pcCurrentModule )
     return;
-
-  m_pcCurrentModule->m_pcAction->setChecked( false );
-  m_pcCurrentModule->destroy();
+  ModulesHandle::destroyModuleIf( m_pcCurrentModule );
   m_pcCurrentModule = NULL;
+  m_pcModuleSubWindow = NULL;
   refreshFrame();
 }
 
@@ -268,7 +261,11 @@ Void SubWindowHandle::scaleView( Int width, Int height )
 
 Void SubWindowHandle::scaleView( const QSize & size )
 {
-  QSize imgViewSize( m_pCurrStream->getWidth(), m_pCurrStream->getHeight() );
+  QSize imgViewSize;
+  if( m_pcCurrFrame )
+    imgViewSize = QSize( m_pcCurrFrame->getWidth(), m_pcCurrFrame->getHeight() );
+  else
+    imgViewSize = QSize( m_pCurrStream->getWidth(), m_pCurrStream->getHeight() );
   QSize newSize = imgViewSize;
   newSize.scale( size, Qt::KeepAspectRatio );
 
@@ -361,7 +358,11 @@ QSize SubWindowHandle::sizeHint() const
     maxSize = p->size();
   }
 
-  QSize isize = QSize( m_pCurrStream->getWidth() + 50, m_pCurrStream->getHeight() + 50 );
+  QSize isize;
+  if( m_pcCurrFrame )
+    isize = QSize( m_pcCurrFrame->getWidth() + 50, m_pcCurrFrame->getHeight() + 50 );
+  else
+    isize = QSize( m_pCurrStream->getWidth() + 50, m_pCurrStream->getHeight() + 50 );
 
   // If the SubWindowHandle needs more space that the avaiable, we'll give
   // to the subwindow a reasonable size preserving the image aspect ratio.
diff --git a/source/app/SubWindowHandle.h b/source/app/SubWindowHandle.h
index 44fecb5..6f3e708 100644
--- a/source/app/SubWindowHandle.h
+++ b/source/app/SubWindowHandle.h
@@ -36,7 +36,7 @@
 #include "TypeDef.h"
 #include "InputStream.h"
 #include "ViewArea.h"
-#include "PlaYUVerModuleIf.h"
+#include "ModulesHandle.h"
 
 namespace plaYUVer
 {
@@ -94,6 +94,11 @@ public:
     return m_pCurrStream;
   }
 
+  PlaYUVerFrame* getCurrFrame()
+  {
+    return m_pcCurrFrame;
+  }
+
   ViewArea* getViewArea()
   {
     return m_cViewArea;
@@ -146,6 +151,12 @@ public:
 
   QSize sizeHint() const;
 
+  Void setWindowName( QString name )
+  {
+    m_cWindowName = name;
+    setWindowTitle( m_cWindowName );
+  }
+
   QString userFriendlyCurrentFile()
   {
     return m_cWindowName;
diff --git a/source/app/plaYUVerApp.cpp b/source/app/plaYUVerApp.cpp
index 026a981..9021902 100644
--- a/source/app/plaYUVerApp.cpp
+++ b/source/app/plaYUVerApp.cpp
@@ -224,6 +224,8 @@ void plaYUVerApp::selectModule( QAction *curr_action )
   if( interfaceChild )
   {
     mdiArea->addSubWindow( interfaceChild );
+    interfaceChild->show();
+    interfaceChild->zoomToFit();
     interfaceChild->getViewArea()->setTool( m_appTool );
   }
   return;
@@ -247,7 +249,7 @@ Void plaYUVerApp::updateFrameProperties()
 {
   if( m_pcCurrentSubWindow )
   {
-    m_pcFrameProperties->setData( m_pcCurrentSubWindow->getInputStream()->getCurrFrame() );
+    m_pcFrameProperties->setData( m_pcCurrentSubWindow->getCurrFrame() );
     //m_pcFrameProperties->setSelection( m_pcCurrentSubWindow->getViewArea()->selectedArea() );
   }
   else
@@ -297,47 +299,51 @@ Void plaYUVerApp::setTimerStatus()
 
 void plaYUVerApp::play()
 {
-  if( m_pcCurrentSubWindow )
+  if( !m_pcCurrentSubWindow )
+    return;
+
+  if( !m_pcCurrentSubWindow->getInputStream() )
+    return;
+
+  if( actionVideoLock->isChecked() && m_acPlayingSubWindows.size() )
   {
-    if( actionVideoLock->isChecked() && m_acPlayingSubWindows.size() )
+    Bool bFind = false;
+    for( Int i = 0; i < m_acPlayingSubWindows.size(); i++ )
     {
-      Bool bFind = false;
-      for( Int i = 0; i < m_acPlayingSubWindows.size(); i++ )
+      if( m_acPlayingSubWindows.at( i ) == m_pcCurrentSubWindow )
       {
-        if( m_acPlayingSubWindows.at( i ) == m_pcCurrentSubWindow )
-        {
-          bFind = true;
-          break;
-        }
-      }
-      if( !bFind )
-      {
-        m_acPlayingSubWindows.append( m_pcCurrentSubWindow );
-        m_pcCurrentSubWindow->seekAbsoluteEvent( m_acPlayingSubWindows.at( 0 )->getInputStream()->getCurrFrameNum() );
-        m_pcCurrentSubWindow->play();
-        m_pcFrameSlider->setMaximum( qMin( m_pcFrameSlider->maximum(), ( Int )m_pcCurrentSubWindow->getInputStream()->getFrameNum() - 1 ) );
+        bFind = true;
+        break;
       }
     }
-    else
+    if( !bFind )
     {
-      playingTimer->stop();
-      m_acPlayingSubWindows.clear();
       m_acPlayingSubWindows.append( m_pcCurrentSubWindow );
+      m_pcCurrentSubWindow->seekAbsoluteEvent( m_acPlayingSubWindows.at( 0 )->getInputStream()->getCurrFrameNum() );
       m_pcCurrentSubWindow->play();
-      m_uiAveragePlayInterval = 0;
-      m_bIsPlaying = false;
-    }
-    if( !m_bIsPlaying )
-    {
-      UInt frameRate = m_acPlayingSubWindows.at( 0 )->getInputStream()->getFrameRate();
-      UInt timeInterval = ( UInt )( 1000.0 / frameRate + 0.5 );
-      qDebug( ) << "Desired frame rate: "
-                << QString::number( 1000 / timeInterval )
-                << " fps";
-      playingTimer->start( timeInterval );
-      m_cTimer.start();
+      m_pcFrameSlider->setMaximum( qMin( m_pcFrameSlider->maximum(), ( Int )m_pcCurrentSubWindow->getInputStream()->getFrameNum() - 1 ) );
     }
   }
+  else
+  {
+    playingTimer->stop();
+    m_acPlayingSubWindows.clear();
+    m_acPlayingSubWindows.append( m_pcCurrentSubWindow );
+    m_pcCurrentSubWindow->play();
+    m_uiAveragePlayInterval = 0;
+    m_bIsPlaying = false;
+  }
+  if( !m_bIsPlaying )
+  {
+    UInt frameRate = m_acPlayingSubWindows.at( 0 )->getInputStream()->getFrameRate();
+    UInt timeInterval = ( UInt )( 1000.0 / frameRate + 0.5 );
+    qDebug( ) << "Desired frame rate: "
+              << QString::number( 1000 / timeInterval )
+              << " fps";
+    playingTimer->start( timeInterval );
+    m_cTimer.start();
+  }
+
 }
 
 void plaYUVerApp::pause()
@@ -453,7 +459,6 @@ void plaYUVerApp::seekEvent( int direction )
     else
     {
       m_pcCurrentSubWindow->seekRelativeEvent( direction > 0 ? true : false );
-
     }
     updateFrameProperties();
     updateCurrFrameNum();
@@ -536,8 +541,6 @@ void plaYUVerApp::chageSubWindowSelection()
     if( activeSubWindow() )
     {
       m_pcCurrentSubWindow = new_window;
-      m_pcStreamProperties->setData( m_pcCurrentSubWindow->getInputStream() );
-      m_pcFrameProperties->setData( m_pcCurrentSubWindow->getInputStream()->getCurrFrame() );
       updateCurrFrameNum();
       updateTotalFrameNum();
       updateStreamProperties();