diff --git a/app/main_window.py b/app/main_window.py
index 3323c14..b08c6ae 100644
--- a/app/main_window.py
+++ b/app/main_window.py
@@ -264,6 +264,9 @@ class MainWindow(QMainWindow):
         help_menu = menubar.addMenu("Aide")
         self._add_action(help_menu, "Rechercher une mise a jour...", None, self._do_check_update)
         help_menu.addSeparator()
+        self._add_action(help_menu, "Integrer a Windows (menu contextuel + association PDF)", None, self._do_register_windows)
+        self._add_action(help_menu, "Retirer l'integration Windows", None, self._do_unregister_windows)
+        help_menu.addSeparator()
         self._add_action(help_menu, "A propos de CopyDev Imposing Tool", None, self._show_about)
 
     def _add_action(self, menu, text, shortcut, callback):
@@ -1281,6 +1284,61 @@ class MainWindow(QMainWindow):
         self._open_pdf(output)
         self._status_label.setText(f"Document test de {num} pages cree")
 
+    def _do_register_windows(self):
+        if sys.platform != "win32":
+            QMessageBox.information(self, "Windows uniquement", "Cette fonction est reservee a Windows.")
+            return
+        import subprocess
+        exe = sys.executable if getattr(sys, 'frozen', False) else os.path.abspath("main.py")
+        try:
+            cmds = [
+                # Association PDF
+                f'reg add "HKCU\\Software\\Classes\\.pdf\\OpenWithProgids" /v "CopyDevImpose" /t REG_SZ /d "" /f',
+                f'reg add "HKCU\\Software\\Classes\\CopyDevImpose" /ve /d "CopyDev Imposing Tool" /f',
+                f'reg add "HKCU\\Software\\Classes\\CopyDevImpose\\shell\\open\\command" /ve /d "\\"{exe}\\" \\"%1\\"" /f',
+                f'reg add "HKCU\\Software\\Classes\\CopyDevImpose\\DefaultIcon" /ve /d "{exe},0" /f',
+                # Menu contextuel
+                f'reg add "HKCU\\Software\\Classes\\SystemFileAssociations\\.pdf\\shell\\CopyDevImpose" /ve /d "CopyDev Impose" /f',
+                f'reg add "HKCU\\Software\\Classes\\SystemFileAssociations\\.pdf\\shell\\CopyDevImpose" /v "SubCommands" /t REG_SZ /d "" /f',
+                f'reg add "HKCU\\Software\\Classes\\SystemFileAssociations\\.pdf\\shell\\CopyDevImpose" /v "Icon" /t REG_SZ /d "{exe},0" /f',
+                f'reg add "HKCU\\Software\\Classes\\SystemFileAssociations\\.pdf\\shell\\CopyDevImpose\\shell\\open" /ve /d "Ouvrir avec CopyDev" /f',
+                f'reg add "HKCU\\Software\\Classes\\SystemFileAssociations\\.pdf\\shell\\CopyDevImpose\\shell\\open\\command" /ve /d "\\"{exe}\\" \\"%1\\"" /f',
+                f'reg add "HKCU\\Software\\Classes\\SystemFileAssociations\\.pdf\\shell\\CopyDevImpose\\shell\\bookletA4" /ve /d "Livret A4" /f',
+                f'reg add "HKCU\\Software\\Classes\\SystemFileAssociations\\.pdf\\shell\\CopyDevImpose\\shell\\bookletA4\\command" /ve /d "\\"{exe}\\" --action booklet_a4 \\"%1\\"" /f',
+                f'reg add "HKCU\\Software\\Classes\\SystemFileAssociations\\.pdf\\shell\\CopyDevImpose\\shell\\bookletA3" /ve /d "Livret A3" /f',
+                f'reg add "HKCU\\Software\\Classes\\SystemFileAssociations\\.pdf\\shell\\CopyDevImpose\\shell\\bookletA3\\command" /ve /d "\\"{exe}\\" --action booklet_a3 \\"%1\\"" /f',
+                f'reg add "HKCU\\Software\\Classes\\SystemFileAssociations\\.pdf\\shell\\CopyDevImpose\\shell\\nup2x2" /ve /d "2x2 par feuille" /f',
+                f'reg add "HKCU\\Software\\Classes\\SystemFileAssociations\\.pdf\\shell\\CopyDevImpose\\shell\\nup2x2\\command" /ve /d "\\"{exe}\\" --action nup_2x2 \\"%1\\"" /f',
+                f'reg add "HKCU\\Software\\Classes\\SystemFileAssociations\\.pdf\\shell\\CopyDevImpose\\shell\\unbooklet" /ve /d "Delivretiser" /f',
+                f'reg add "HKCU\\Software\\Classes\\SystemFileAssociations\\.pdf\\shell\\CopyDevImpose\\shell\\unbooklet\\command" /ve /d "\\"{exe}\\" --action unbooklet \\"%1\\"" /f',
+            ]
+            for cmd in cmds:
+                subprocess.run(cmd, shell=True, capture_output=True)
+            QMessageBox.information(self, "Integration Windows",
+                "CopyDev Imposing Tool est maintenant integre a Windows !\n\n"
+                "- Clic droit sur un PDF > CopyDev Impose\n"
+                "- Ouvrir avec > CopyDev Imposing Tool")
+            self._status_label.setText("Integration Windows effectuee")
+        except Exception as e:
+            QMessageBox.critical(self, "Erreur", f"Echec de l'integration :\n{e}")
+
+    def _do_unregister_windows(self):
+        if sys.platform != "win32":
+            return
+        import subprocess
+        try:
+            cmds = [
+                'reg delete "HKCU\\Software\\Classes\\CopyDevImpose" /f',
+                'reg delete "HKCU\\Software\\Classes\\.pdf\\OpenWithProgids" /v "CopyDevImpose" /f',
+                'reg delete "HKCU\\Software\\Classes\\SystemFileAssociations\\.pdf\\shell\\CopyDevImpose" /f',
+            ]
+            for cmd in cmds:
+                subprocess.run(cmd, shell=True, capture_output=True)
+            QMessageBox.information(self, "Integration Windows", "Integration Windows retiree.")
+            self._status_label.setText("Integration Windows retiree")
+        except Exception as e:
+            QMessageBox.critical(self, "Erreur", str(e))
+
     def _do_check_update(self):
         from app.updater import check_for_update, do_update, VERSION
         self._status_label.setText("Recherche de mises a jour...")
diff --git a/app/updater.py b/app/updater.py
index 1ca5cd5..bc88bb8 100644
--- a/app/updater.py
+++ b/app/updater.py
@@ -14,7 +14,7 @@ REPO = "jules/copydev-imposing-tool"
 BRANCH = "master"
 
 # Version actuelle (incrementee a chaque release)
-VERSION = "3.4.0"
+VERSION = "3.4.1"
 
 
 def get_remote_version():
diff --git a/version.txt b/version.txt
index 1809198..47b322c 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-3.4.0
+3.4.1