diff --git a/BlueBerry/Bundles/org.blueberry.ui.qt/src/berryQCHPluginListener.cpp b/BlueBerry/Bundles/org.blueberry.ui.qt/src/berryQCHPluginListener.cpp
index 1fae2dbb99..b3ce77035e 100644
--- a/BlueBerry/Bundles/org.blueberry.ui.qt/src/berryQCHPluginListener.cpp
+++ b/BlueBerry/Bundles/org.blueberry.ui.qt/src/berryQCHPluginListener.cpp
@@ -1,152 +1,157 @@
 /*=========================================================================
 
  Program:   BlueBerry Platform
  Language:  C++
  Date:      $Date$
  Version:   $Revision$
 
  Copyright (c) German Cancer Research Center, Division of Medical and
  Biological Informatics. All rights reserved.
  See MITKCopyright.txt or http://www.mitk.org/copyright.html for details.
 
  This software is distributed WITHOUT ANY WARRANTY; without even
  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  PURPOSE.  See the above copyright notices for more information.
 
  =========================================================================*/
 
 
 #include "berryQCHPluginListener.h"
 
 #include <ctkPlugin.h>
 
 #include <QDir>
 #include <QDateTime>
 
 #include "../berryQtAssistantUtil.h"
 
 namespace berry {
 
 QCHPluginListener::QCHPluginListener(ctkPluginContext* context)
   : delayRegistration(true), context(context)
 {
 }
 
 void QCHPluginListener::processPlugins()
 {
   if (QtAssistantUtil::GetHelpCollectionFile().isEmpty())
   {
     return;
   }
 
   foreach (QSharedPointer<ctkPlugin> plugin, context->getPlugins())
   {
     if (isPluginResolved(plugin))
       addPlugin(plugin);
     else
       removePlugin(plugin);
   }
 
   delayRegistration = false;
 }
 
 void QCHPluginListener::pluginChanged(const ctkPluginEvent& event)
 {
   if (delayRegistration)
   {
     this->processPlugins();
     return;
   }
 
   /* Only should listen for RESOLVED and UNRESOLVED events.
    *
    * When a plugin is updated the Framework will publish an UNRESOLVED and
    * then a RESOLVED event which should cause the plugin to be removed
    * and then added back into the registry.
    *
    * When a plugin is uninstalled the Framework should publish an UNRESOLVED
    * event and then an UNINSTALLED event so the plugin will have been removed
    * by the UNRESOLVED event before the UNINSTALLED event is published.
    */
   QSharedPointer<ctkPlugin> plugin = event.getPlugin();
   switch (event.getType())
   {
     case ctkPluginEvent::RESOLVED :
       addPlugin(plugin);
       break;
     case ctkPluginEvent::UNRESOLVED :
       removePlugin(plugin);
       break;
   }
 }
 
 bool QCHPluginListener::isPluginResolved(QSharedPointer<ctkPlugin> plugin)
 {
   return (plugin->getState() & (ctkPlugin::RESOLVED | ctkPlugin::ACTIVE | ctkPlugin::STARTING | ctkPlugin::STOPPING)) != 0;
 }
 
 void QCHPluginListener::removePlugin(QSharedPointer<ctkPlugin> plugin)
 {
   // bail out if system plugin
   if (plugin->getPluginId() == 0) return;
 
   QFileInfo qchDirInfo = context->getDataFile("qch_files/" + QString::number(plugin->getPluginId()));
   if (qchDirInfo.exists())
   {
     QDir qchDir(qchDirInfo.absoluteFilePath());
     QStringList qchEntries = qchDir.entryList(QStringList("*.qch"));
+    QStringList qchFiles;
+    foreach(QString qchEntry, qchEntries)
+    {
+      qchFiles << qchDir.absoluteFilePath(qchEntry);
+    }
     // unregister the qch files
-    QtAssistantUtil::UnregisterQCHFiles(qchEntries);
+    QtAssistantUtil::UnregisterQCHFiles(qchFiles);
     // clean the directory
     foreach(QString qchEntry, qchEntries)
     {
       qchDir.remove(qchEntry);
     }
   }
 }
 
 void QCHPluginListener::addPlugin(QSharedPointer<ctkPlugin> plugin)
 {
   // bail out if system plugin
   if (plugin->getPluginId() == 0) return;
 
   QFileInfo qchDirInfo = context->getDataFile("qch_files/" + QString::number(plugin->getPluginId()));
   QUrl location(plugin->getLocation());
   QFileInfo pluginFileInfo(location.toLocalFile());
 
   if (!qchDirInfo.exists() || qchDirInfo.lastModified() < pluginFileInfo.lastModified())
   {
     removePlugin(plugin);
 
     if (!qchDirInfo.exists())
     {
       QDir().mkpath(qchDirInfo.absoluteFilePath());
     }
 
     QStringList localQCHFiles;
     QStringList resourceList = plugin->findResources("/", "*.qch", true);
     foreach(QString resource, resourceList)
     {
       QByteArray content = plugin->getResource(resource);
       QFile localFile(qchDirInfo.absoluteFilePath() + "/" + resource.section('/', -1));
       localFile.open(QIODevice::WriteOnly);
       localFile.write(content);
       localFile.close();
       if (localFile.error() != QFile::NoError)
       {
         BERRY_WARN << "Error writing " << localFile.fileName().toStdString()
                    << ": " << localFile.errorString().toStdString();
       }
       else
       {
         localQCHFiles << localFile.fileName();
       }
     }
 
     QtAssistantUtil::RegisterQCHFiles(localQCHFiles);
   }
 
 }
 
 }