diff --git a/qt_ui/liberation_install.py b/qt_ui/liberation_install.py
index 0bbcb0b0..341cd45a 100644
--- a/qt_ui/liberation_install.py
+++ b/qt_ui/liberation_install.py
@@ -112,7 +112,7 @@ def replace_mission_scripting_file():
     )
     liberation_scripting_path = "./resources/scripts/MissionScripting.lua"
     backup_scripting_path = "./resources/scripts/MissionScripting.original.lua"
-    if os.path.isfile(mission_scripting_path):
+    if install_dir != "" and os.path.isfile(mission_scripting_path):
         with open(mission_scripting_path, "r") as ms:
             current_file_content = ms.read()
         with open(liberation_scripting_path, "r") as libe_ms:
@@ -133,5 +133,9 @@ def restore_original_mission_scripting():
     )
     backup_scripting_path = "./resources/scripts/MissionScripting.original.lua"
 
-    if os.path.isfile(backup_scripting_path) and os.path.isfile(mission_scripting_path):
+    if (
+        install_dir != ""
+        and os.path.isfile(backup_scripting_path)
+        and os.path.isfile(mission_scripting_path)
+    ):
         copyfile(backup_scripting_path, mission_scripting_path)
diff --git a/qt_ui/main.py b/qt_ui/main.py
index 43cf6e53..26c5cb48 100644
--- a/qt_ui/main.py
+++ b/qt_ui/main.py
@@ -95,6 +95,22 @@ def run_ui(game: Optional[Game]) -> None:
     uiconstants.load_aircraft_banners()
     uiconstants.load_vehicle_banners()
 
+    # Show warning if no DCS Installation directory was set
+    if liberation_install.get_dcs_install_directory() == "":
+        QtWidgets.QMessageBox.warning(
+            splash,
+            "No DCS installation directory.",
+            "The DCS Installation directory is not set correctly. "
+            "This will prevent DCS Liberation to work properly as the MissionScripting "
+            "file will not be modified."
+            "<br/><br/>To solve this problem, you can set the Installation directory "
+            "within the preferences menu. You can also manually edit or replace the "
+            "following file:"
+            "<br/><br/><strong>&lt;dcs_installation_directory&gt;/Scripts/MissionScripting.lua</strong>"
+            "<br/><br/>The easiest way to do it is to replace the original file with the file in dcs-liberation distribution (&lt;dcs_liberation_installation&gt;/resources/scripts/MissionScripting.lua)."
+            "<br/><br/>You can find more information on how to manually change this file in the Liberation Wiki (Page: Dedicated Server Guide) on GitHub.</p>",
+            QtWidgets.QMessageBox.StandardButton.Ok,
+        )
     # Replace DCS Mission scripting file to allow DCS Liberation to work
     try:
         liberation_install.replace_mission_scripting_file()
diff --git a/qt_ui/windows/preferences/QLiberationFirstStartWindow.py b/qt_ui/windows/preferences/QLiberationFirstStartWindow.py
index 4a300f35..78b898a1 100644
--- a/qt_ui/windows/preferences/QLiberationFirstStartWindow.py
+++ b/qt_ui/windows/preferences/QLiberationFirstStartWindow.py
@@ -58,6 +58,12 @@ class QLiberationFirstStartWindow(QDialog):
         
         <p>As you click on the button below, the file will be replaced in your DCS installation directory.</p>
         
+        <br/>
+        <p>If you leave the DCS Installation Directory empty, DCS Liberation can not automatically replace the MissionScripting.lua and will therefore not work correctly!
+        In this case, you need to edit the file yourself. The easiest way to do it is to replace the original file with the file in dcs-liberation distribution (&lt;dcs_liberation_installation&gt;/resources/scripts/MissionScripting.lua).
+        <br/><br/>You can find more information on how to manually change this file in the Liberation Wiki (Page: Dedicated Server Guide) on GitHub.</p>
+
+        
         <br/><br/>
         
         <strong>Thank you for reading !</strong>
diff --git a/qt_ui/windows/preferences/QLiberationPreferences.py b/qt_ui/windows/preferences/QLiberationPreferences.py
index 0d41b298..fbfa6770 100644
--- a/qt_ui/windows/preferences/QLiberationPreferences.py
+++ b/qt_ui/windows/preferences/QLiberationPreferences.py
@@ -22,6 +22,7 @@ class QLiberationPreferences(QFrame):
         super(QLiberationPreferences, self).__init__()
         self.saved_game_dir = ""
         self.dcs_install_dir = ""
+        self.install_dir_ignore_warning = False
 
         self.dcs_install_dir = liberation_install.get_dcs_install_directory()
         self.saved_game_dir = liberation_install.get_saved_game_dir()
@@ -102,17 +103,38 @@ class QLiberationPreferences(QFrame):
             error_dialog.exec_()
             return False
 
-        if not os.path.isdir(self.dcs_install_dir):
+        if self.install_dir_ignore_warning and self.dcs_install_dir == "":
+            warning_dialog = QMessageBox.warning(
+                self,
+                "The DCS Installation directory was not set",
+                "You set an empty DCS Installation directory! "
+                "<br/><br/>Without this directory, DCS Liberation can not replace the MissionScripting.lua for you and will not work properly. "
+                "In this case, you need to edit the MissionScripting.lua yourself. The easiest way to do it is to replace the original file (&lt;dcs_installation_directory&gt;/Scripts/MissionScripting.lua) with the file in dcs-liberation distribution (&lt;dcs_liberation_installation&gt;/resources/scripts/MissionScripting.lua)."
+                "<br/><br/>You can find more information on how to manually change this file in the Liberation Wiki (Page: Dedicated Server Guide) on GitHub.</p>"
+                "<br/><br/>Are you sure that you want to leave the installation directory empty?"
+                "<br/><br/><strong>This is only recommended for expert users!</strong>",
+                QMessageBox.StandardButton.Yes,
+                QMessageBox.StandardButton.No,
+            )
+            if warning_dialog == QMessageBox.No:
+                return False
+        elif not os.path.isdir(self.dcs_install_dir):
             error_dialog = QMessageBox.critical(
                 self,
                 "Wrong DCS installation directory.",
-                self.dcs_install_dir + " is not a valid directory",
+                self.dcs_install_dir
+                + " is not a valid directory. DCS Liberation requires the installation directory to replace the MissionScripting.lua"
+                "<br/><br/>If you ignore this Error, DCS Liberation can not work properly and needs your attention. "
+                "In this case, you need to edit the MissionScripting.lua yourself. The easiest way to do it is to replace the original file (&lt;dcs_installation_directory&gt;/Scripts/MissionScripting.lua) with the file in dcs-liberation distribution (&lt;dcs_liberation_installation&gt;/resources/scripts/MissionScripting.lua)."
+                "<br/><br/>You can find more information on how to manually change this file in the Liberation Wiki (Page: Dedicated Server Guide) on GitHub.</p>"
+                "<br/><br/><strong>This is only recommended for expert users!</strong>",
+                QMessageBox.StandardButton.Ignore,
                 QMessageBox.StandardButton.Ok,
             )
-            error_dialog.exec_()
+            if error_dialog == QMessageBox.Ignore:
+                self.install_dir_ignore_warning = True
             return False
-
-        if not os.path.isdir(
+        elif not os.path.isdir(
             os.path.join(self.dcs_install_dir, "Scripts")
         ) and os.path.isfile(os.path.join(self.dcs_install_dir, "bin", "DCS.exe")):
             error_dialog = QMessageBox.critical(