diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7cfef1c3..a0e7a99b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ CHANGELOG for FlatCAM beta
 - in CNCJob UI Autolevelling - Probing GCode has now a header
 - in CNCJob UI Autolevelling - Added entries in Preferences
 - in CNCJob UI Autolevelling - finished the Import Height Map method
+- in CNCJob UI Autolevelling - made autolevelling checkbox state persistent between app restarts
 
 14.08.2020
 
diff --git a/appGUI/ObjectUI.py b/appGUI/ObjectUI.py
index 95fa6f5b..618b96ea 100644
--- a/appGUI/ObjectUI.py
+++ b/appGUI/ObjectUI.py
@@ -2389,9 +2389,6 @@ class CNCObjectUI(ObjectUI):
         self.al_probe_points_table.setMinimumHeight(self.al_probe_points_table.getHeight())
         self.al_probe_points_table.setMaximumHeight(self.al_probe_points_table.getHeight())
 
-        # Signals
-        self.sal_cb.stateChanged.connect(lambda state: self.al_frame.show() if state else self.al_frame.hide())
-
         # Set initial UI
         self.al_frame.hide()
         # self.on_mode_radio(val='grid')
diff --git a/appObjects/FlatCAMCNCJob.py b/appObjects/FlatCAMCNCJob.py
index 4af20771..29ddcfea 100644
--- a/appObjects/FlatCAMCNCJob.py
+++ b/appObjects/FlatCAMCNCJob.py
@@ -544,25 +544,13 @@ class CNCJobObject(FlatCAMObj, CNCjob):
         # set if to display text annotations
         self.ui.annotation_cb.set_value(self.app.defaults["cncjob_annotation"])
 
-        # Show/Hide Advanced Options
-        if self.app.defaults["global_app_level"] == 'b':
-            self.ui.level.setText(_(
-                '<span style="color:green;"><b>Basic</b></span>'
-            ))
-
-            self.ui.sal_cb.hide()
-        else:
-            self.ui.level.setText(_(
-                '<span style="color:red;"><b>Advanced</b></span>'
-            ))
-            self.ui.sal_cb.show()
-
         self.ui.updateplot_button.clicked.connect(self.on_updateplot_button_click)
         self.ui.export_gcode_button.clicked.connect(self.on_exportgcode_button_click)
         self.ui.review_gcode_button.clicked.connect(self.on_edit_code_click)
         self.ui.editor_button.clicked.connect(lambda: self.app.object2editor())
 
         # autolevelling signals
+        self.ui.sal_cb.stateChanged.connect(self.on_autolevelling)
         self.ui.al_mode_radio.activated_custom.connect(self.on_mode_radio)
         self.ui.al_controller_combo.currentIndexChanged.connect(self.on_controller_change)
         self.ui.com_search_button.clicked.connect(self.on_search_ports)
@@ -578,6 +566,21 @@ class CNCJobObject(FlatCAMObj, CNCjob):
 
         self.ui.cncplot_method_combo.activated_custom.connect(self.on_plot_kind_change)
 
+        # Show/Hide Advanced Options
+        if self.app.defaults["global_app_level"] == 'b':
+            self.ui.level.setText(_(
+                '<span style="color:green;"><b>Basic</b></span>'
+            ))
+
+            self.ui.sal_cb.hide()
+            self.ui.sal_cb.set_value(False)
+        else:
+            self.ui.level.setText(_(
+                '<span style="color:red;"><b>Advanced</b></span>'
+            ))
+            self.ui.sal_cb.show()
+            self.ui.sal_cb.set_value(self.app.defaults["cncjob_al_status"])
+
         preamble = self.append_snippet
         postamble = self.prepend_snippet
         gc = self.export_gcode(preamble=preamble, postamble=postamble, to_file=True)
@@ -829,6 +832,10 @@ class CNCJobObject(FlatCAMObj, CNCjob):
         if key == QtCore.Qt.Key_J or key == 'J':
             l_x, l_y = self.app.on_jump_to()
 
+    def on_autolevelling(self, state):
+        self.ui.al_frame.show() if state else self.ui.al_frame.hide()
+        self.app.defaults["cncjob_al_status"] = True if state else False
+
     def on_show_al_table(self, state):
         self.ui.al_probe_points_table.show() if state else self.ui.al_probe_points_table.hide()
 
@@ -992,7 +999,7 @@ class CNCJobObject(FlatCAMObj, CNCjob):
         header += '(Type: ' + "Autolevelling Probing GCode " + ')\n'
 
         header += '(Units: ' + self.units.upper() + ')\n'
-        header += '(Created on ' + time_str + ')\n\n'
+        header += '(Created on ' + time_str + ')\n'
 
         # commands
         if controller == 'MACH3':
@@ -1019,7 +1026,7 @@ class CNCJobObject(FlatCAMObj, CNCjob):
         # #############################################################################################################
 
         # header
-        p_gcode += header + '\n\n'
+        p_gcode += header + '\n'
         # supplementary message for LinuxCNC
         if controller == 'LinuxCNC':
             probing_var += "The file with the stored probing points can be found\n" \
diff --git a/defaults.py b/defaults.py
index 297839f8..dfb93eda 100644
--- a/defaults.py
+++ b/defaults.py
@@ -376,6 +376,7 @@ class FlatCAMDefaults:
         "cncjob_annotation_fontsize": 9,
         "cncjob_annotation_fontcolor": '#990000',
         # Autolevelling
+        "cncjob_al_status": False,
         "cncjob_al_mode": 'grid',
         "cncjob_al_rows": 4,
         "cncjob_al_columns": 4,