diff -Naur LuminanceHDR-v.2.6.1.1-original/src/CMakeLists.txt LuminanceHDR-v.2.6.1.1/src/CMakeLists.txt
--- LuminanceHDR-v.2.6.1.1-original/src/CMakeLists.txt	2021-01-11 04:41:28.000000000 -0500
+++ LuminanceHDR-v.2.6.1.1/src/CMakeLists.txt	2021-07-10 20:22:38.791888471 -0400
@@ -22,7 +22,6 @@
 ADD_SUBDIRECTORY(Fileformat)
 ADD_SUBDIRECTORY(Alignment)
 ADD_SUBDIRECTORY(HdrWizard)
-ADD_SUBDIRECTORY(HelpBrowser)
 ADD_SUBDIRECTORY(Preferences)
 ADD_SUBDIRECTORY(Projection)
 ADD_SUBDIRECTORY(Resize)
diff -Naur LuminanceHDR-v.2.6.1.1-original/src/MainWindow/MainWindow.cpp LuminanceHDR-v.2.6.1.1/src/MainWindow/MainWindow.cpp
--- LuminanceHDR-v.2.6.1.1-original/src/MainWindow/MainWindow.cpp	2021-01-11 04:41:28.000000000 -0500
+++ LuminanceHDR-v.2.6.1.1/src/MainWindow/MainWindow.cpp	2021-07-10 20:21:15.592090523 -0400
@@ -99,7 +99,6 @@
 #include <HdrWizard/AutoAntighosting.h>
 #include <HdrWizard/HdrWizard.h>
 #include <HdrWizard/WhiteBalance.h>
-#include <HelpBrowser/helpbrowser.h>
 #include <LibpfsAdditions/formathelper.h>
 #include <Preferences/PreferencesDialog.h>
 #include <PreviewPanel/PreviewPanel.h>
@@ -209,7 +208,6 @@
 QMap<int, MainWindow *> MainWindow::sm_mainWindowMap =
     QMap<int, MainWindow *>();
 QScopedPointer<UpdateChecker> MainWindow::sm_updateChecker;
-HelpBrowser *MainWindow::sm_helpBrowser = nullptr;
 
 MainWindow::MainWindow(QWidget *parent)
     : QMainWindow(parent),
@@ -1060,27 +1058,6 @@
 }
 // Zoom = Viewers (END)
 
-void MainWindow::on_documentationAction_triggered() {
-    if (sm_helpBrowser == nullptr) {
-        sm_helpBrowser =
-            new HelpBrowser(0, QStringLiteral("Luminance HDR Help"));
-        sm_helpBrowser->setAttribute(Qt::WA_DeleteOnClose);
-        connect(sm_helpBrowser, &QObject::destroyed, sm_helpBrowser,
-                &QObject::deleteLater);
-        connect(sm_helpBrowser, &HelpBrowser::closed, this,
-                &MainWindow::helpBrowserClosed);
-        sm_helpBrowser->show();
-    } else {
-        sm_helpBrowser->show();
-        sm_helpBrowser->activateWindow();
-        sm_helpBrowser->raise();
-    }
-}
-
-void MainWindow::helpBrowserClosed() {
-    sm_helpBrowser = nullptr;
-}
-
 void MainWindow::enterWhatsThis() { QWhatsThis::enterWhatsThisMode(); }
 
 void MainWindow::openRecentFile() {
@@ -1450,11 +1427,6 @@
         reparentViewer(m_g_v_fullscreen);
     }
     sm_NumMainWindows--;
-    if (sm_NumMainWindows == 0) {
-        if (sm_helpBrowser) {
-            sm_helpBrowser->close();
-        }
-    }
 
     if (sm_NumMainWindows == 0) {
         // Last MainWindow is dead...
diff -Naur LuminanceHDR-v.2.6.1.1-original/src/MainWindow/MainWindow.h LuminanceHDR-v.2.6.1.1/src/MainWindow/MainWindow.h
--- LuminanceHDR-v.2.6.1.1-original/src/MainWindow/MainWindow.h	2021-01-11 04:41:28.000000000 -0500
+++ LuminanceHDR-v.2.6.1.1/src/MainWindow/MainWindow.h	2021-07-10 20:21:18.615119517 -0400
@@ -67,7 +67,6 @@
 class LdrViewer;
 class HdrViewer;
 class PreviewPanel;          // #include "PreviewPanel/PreviewPanel.h"
-class HelpBrowser;           // #include "HelpBrowser/helpbrowser.h"
 class TMOProgressIndicator;  // #include
                              // "TonemappingPanel/TMOProgressIndicator.h"
 class TonemappingPanel;      // #include "TonemappingPanel/TonemappingPanel.h"
@@ -146,7 +145,6 @@
     void on_normalSizeAct_triggered();
     void updateMagnificationButtons(GenericViewer *);
 
-    void on_documentationAction_triggered();
     void enterWhatsThis();
 
     void on_OptionsAction_triggered();
@@ -180,7 +178,6 @@
     void enableCrop(bool);
     void disableCrop();
 
-    void helpBrowserClosed();
     void on_actionDonate_triggered();
 
     void onUpdateAvailable();
@@ -359,7 +356,6 @@
     static QScopedPointer<UpdateChecker> sm_updateChecker;
     static QMap<int, MainWindow *>
         sm_mainWindowMap;  // maps m_winId with MainWindow "this" ponter
-    static HelpBrowser *sm_helpBrowser;
 };
 
 #endif  // MAINWINDOW_H
diff -Naur LuminanceHDR-v.2.6.1.1-original/src/MainWindow/MainWindow.ui LuminanceHDR-v.2.6.1.1/src/MainWindow/MainWindow.ui
--- LuminanceHDR-v.2.6.1.1-original/src/MainWindow/MainWindow.ui	2021-01-11 04:41:28.000000000 -0500
+++ LuminanceHDR-v.2.6.1.1/src/MainWindow/MainWindow.ui	2021-07-14 08:26:56.388346798 -0400
@@ -61,7 +61,6 @@
      <addaction name="actionDevelopers_Website"/>
      <addaction name="actionLuminance_HDR_Website"/>
     </widget>
-    <addaction name="documentationAction"/>
     <addaction name="actionWhat_s_This"/>
     <addaction name="separator"/>
     <addaction name="actionUpdateAvailable"/>
@@ -422,30 +421,6 @@
     <string>9</string>
    </property>
   </action>
-  <action name="documentationAction">
-   <property name="icon">
-    <iconset theme="help-contents">
-     <normaloff>.</normaloff>.</iconset>
-   </property>
-   <property name="text">
-    <string>&amp;Contents...</string>
-   </property>
-   <property name="iconText">
-    <string>About...</string>
-   </property>
-   <property name="toolTip">
-    <string>Open user manual for Luminance HDR</string>
-   </property>
-   <property name="statusTip">
-    <string>Open user manual for Luminance HDR</string>
-   </property>
-   <property name="whatsThis">
-    <string>Open user manual for Luminance HDR</string>
-   </property>
-   <property name="shortcut">
-    <string>F1</string>
-   </property>
-  </action>
   <action name="normalSizeAct">
    <property name="checkable">
     <bool>true</bool>