diff --git a/src/Doc/CMakeLists.txt b/src/Doc/CMakeLists.txt
index 8814adc3de..3649ed4dd0 100644
--- a/src/Doc/CMakeLists.txt
+++ b/src/Doc/CMakeLists.txt
@@ -6,31 +6,7 @@ configure_file(LICENSE.html
 configure_file(CONTRIBUTORS
     ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_DOCDIR}/CONTRIBUTORS COPYONLY)
 
-
-
-if(BUILD_GUI)
-    FILE(GLOB QCH_FILES freecad.qch.part*)
-    list(SORT QCH_FILES)
-    set (DEST_FILE ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_DOCDIR}/freecad.qch)
-    foreach(SRC_FILE ${QCH_FILES})
-        if(${SRC_FILE} IS_NEWER_THAN ${DEST_FILE})
-            EXECUTE_PROCESS(COMMAND ${PYTHON_EXECUTABLE} ${CMAKE_SOURCE_DIR}/src/Tools/catfiles.py
-                  --outputfile=${DEST_FILE} ${QCH_FILES}
-                  WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
-                  OUTPUT_STRIP_TRAILING_WHITESPACE)
-            break()
-        endif()
-    endforeach()
-
-    configure_file(freecad.qhc ${CMAKE_BINARY_DIR}/${CMAKE_INSTALL_DOCDIR}/freecad.qhc COPYONLY)
-    INSTALL(FILES
-        ${DEST_FILE}
-        DESTINATION ${CMAKE_INSTALL_DOCDIR}
-    )
-endif(BUILD_GUI)
-
 INSTALL(FILES
-    freecad.qhc
     ThirdPartyLibraries.html
     LICENSE.html
     CONTRIBUTORS
diff --git a/src/Doc/freecad.qch.part00 b/src/Doc/freecad.qch.part00
deleted file mode 100644
index 5e40f2109c..0000000000
Binary files a/src/Doc/freecad.qch.part00 and /dev/null differ
diff --git a/src/Doc/freecad.qch.part01 b/src/Doc/freecad.qch.part01
deleted file mode 100644
index 0ddcfe3f98..0000000000
Binary files a/src/Doc/freecad.qch.part01 and /dev/null differ
diff --git a/src/Doc/freecad.qch.part02 b/src/Doc/freecad.qch.part02
deleted file mode 100644
index 54a5aec3f7..0000000000
Binary files a/src/Doc/freecad.qch.part02 and /dev/null differ
diff --git a/src/Doc/freecad.qch.part03 b/src/Doc/freecad.qch.part03
deleted file mode 100644
index 28acda59c0..0000000000
Binary files a/src/Doc/freecad.qch.part03 and /dev/null differ
diff --git a/src/Doc/freecad.qch.part04 b/src/Doc/freecad.qch.part04
deleted file mode 100644
index 337f6a1308..0000000000
Binary files a/src/Doc/freecad.qch.part04 and /dev/null differ
diff --git a/src/Doc/freecad.qhc b/src/Doc/freecad.qhc
deleted file mode 100644
index 925fd07dce..0000000000
Binary files a/src/Doc/freecad.qhc and /dev/null differ
diff --git a/src/Gui/MainWindow.cpp b/src/Gui/MainWindow.cpp
index 97b7e436b4..da07ab1b9a 100644
--- a/src/Gui/MainWindow.cpp
+++ b/src/Gui/MainWindow.cpp
@@ -692,18 +692,20 @@ void MainWindow::whatsThis()
 
 void MainWindow::showDocumentation(const QString& help)
 {
-    // temporary - allows to enable/disable the use of the Help module
-    ParameterGrp::handle hGrp = App::GetApplication().GetParameterGroupByPath("User parameter:BaseApp/Preferences/Mod/Help");
-    bool useHelpModule = hGrp->GetBool("UseHelpModule", false);
-    if (useHelpModule) {
+    Base::PyGILStateLocker lock;
+    PyObject* module = PyImport_ImportModule("Help");
+    if (module) {
+        Py_DECREF(module);
         Gui::Command::addModule(Gui::Command::Gui,"Help");
         Gui::Command::doCommand(Gui::Command::Gui,"Help.show(\"%s\")", help.toStdString().c_str());
-    } else {
+    }
+    else {
+        PyErr_Clear();
         QUrl url(help);
         if (url.scheme().isEmpty()) {
-            QString page;
-            page = QString::fromUtf8("%1.html").arg(help);
-            d->assistant->showDocumentation(page);
+            QMessageBox::critical(getMainWindow(), tr("Help addon needed!"),
+            tr("The Help system of %s is now handled by the \"Help\" addon. "
+               "Install it with menu Tools > Addons Manager"),qApp->applicationName());
         }
         else {
             QDesktopServices::openUrl(url);