diff --git a/CHANGELOG.md b/CHANGELOG.md
index 08c2483c..73b26e1f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,11 @@ CHANGELOG for FlatCAM beta
 - refactored code in Preferences section
 - added the wheels for a working pair of GDAL-Rasterio modules (python 3.10)
 - fixed an issue when trying to print an exception message
+- fixed an issue due of recent changes that made the application think that is run always for the first time; fixed not applying the selected language translation
+- some more code is refactored in the Preferences
+- the axis will now be drawn on the canvas as they were left in the previous run (just like the HUD and the Workspace)
+- for processors with less than 4 cores now the default number of workers is 1 (changed from 2)
+- some graphical settings go now directly to the defaults dictionary and will not pass through the `options` app dictionary
 
 19.02.2022
 
diff --git a/appGUI/MainGUI.py b/appGUI/MainGUI.py
index c5012c95..8bdb0927 100644
--- a/appGUI/MainGUI.py
+++ b/appGUI/MainGUI.py
@@ -1867,18 +1867,18 @@ class MainGUI(QtWidgets.QMainWindow):
         self.infobar.addWidget(self.fcinfo, stretch=1)
 
         self.infobar.addWidget(self.delta_coords_toolbar)
-        self.delta_coords_toolbar.setVisible(self.app.options["global_delta_coordsbar_show"])
+        self.delta_coords_toolbar.setVisible(self.app.defaults["global_delta_coordsbar_show"])
 
         self.infobar.addWidget(self.coords_toolbar)
-        self.coords_toolbar.setVisible(self.app.options["global_coordsbar_show"])
+        self.coords_toolbar.setVisible(self.app.defaults["global_coordsbar_show"])
 
         self.grid_toolbar.setMaximumHeight(24)
         self.infobar.addWidget(self.grid_toolbar)
-        self.grid_toolbar.setVisible(self.app.options["global_gridbar_show"])
+        self.grid_toolbar.setVisible(self.app.defaults["global_gridbar_show"])
 
         self.status_toolbar.setMaximumHeight(24)
         self.infobar.addWidget(self.status_toolbar)
-        self.status_toolbar.setVisible(self.app.options["global_statusbar_show"])
+        self.status_toolbar.setVisible(self.app.defaults["global_statusbar_show"])
 
         self.units_label = FCLabel("[mm]")
         self.units_label.setToolTip(_("Application units"))
@@ -1887,7 +1887,7 @@ class MainGUI(QtWidgets.QMainWindow):
 
         # this used to be done in the APP.__init__()
         self.activity_view = FlatCAMActivityView(icon_location=self.app.resource_location,
-                                                 icon_kind=self.app.options["global_activity_icon"],
+                                                 icon_kind=self.app.defaults["global_activity_icon"],
                                                  replot_callback=self.app.on_toolbar_replot)
         self.infobar.addWidget(self.activity_view)
 
@@ -1946,7 +1946,7 @@ class MainGUI(QtWidgets.QMainWindow):
         self.plugin2_pref_form = Plugins2PreferencesUI(app=self.app)
         self.plugin_eng_pref_form = PluginsEngravingPreferencesUI(app=self.app)
 
-        self.util_pref_form = UtilPreferencesUI(decimals=self.decimals, defaults=self.app.options)
+        self.util_pref_form = UtilPreferencesUI(app=self.app)
 
         QtCore.QCoreApplication.instance().installEventFilter(self)
 
@@ -2044,7 +2044,7 @@ class MainGUI(QtWidgets.QMainWindow):
         self.plot_tab_area.tabBar.setContextMenuPolicy(QtCore.Qt.ContextMenuPolicy.ActionsContextMenu)
         self.on_tab_setup_context_menu()
         # activate initial state
-        self.on_detachable_tab_rmb_click(self.app.options["global_tabs_detachable"])
+        self.on_detachable_tab_rmb_click(self.app.defaults["global_tabs_detachable"])
 
         # status bar activation/deactivation
         self.infobar.setContextMenuPolicy(QtCore.Qt.ContextMenuPolicy.ActionsContextMenu)
@@ -2164,20 +2164,20 @@ class MainGUI(QtWidgets.QMainWindow):
 
         :return: None
         """
-        self.app.options["global_def_win_x"] = x
-        self.app.options["global_def_win_y"] = y
-        self.app.options["global_def_win_w"] = width
-        self.app.options["global_def_win_h"] = height
-        self.app.options["global_def_notebook_width"] = notebook_width
+        self.app.defaults["global_def_win_x"] = x
+        self.app.defaults["global_def_win_y"] = y
+        self.app.defaults["global_def_win_w"] = width
+        self.app.defaults["global_def_win_h"] = height
+        self.app.defaults["global_def_notebook_width"] = notebook_width
         self.app.preferencesUiManager.save_defaults()
 
     def restore_main_win_geom(self):
         try:
-            self.setGeometry(self.app.options["global_def_win_x"],
-                             self.app.options["global_def_win_y"],
-                             self.app.options["global_def_win_w"],
-                             self.app.options["global_def_win_h"])
-            self.splitter.setSizes([self.app.options["global_def_notebook_width"], 0])
+            self.setGeometry(self.app.defaults["global_def_win_x"],
+                             self.app.defaults["global_def_win_y"],
+                             self.app.defaults["global_def_win_w"],
+                             self.app.defaults["global_def_win_h"])
+            self.splitter.setSizes([self.app.defaults["global_def_notebook_width"], 0])
         except KeyError as e:
             self.app.log.debug("appGUI.MainGUI.restore_main_win_geom() --> %s" % str(e))
 
@@ -2188,7 +2188,7 @@ class MainGUI(QtWidgets.QMainWindow):
 
         :return: None
         """
-        tb = self.app.options["global_toolbar_view"]
+        tb = self.app.defaults["global_toolbar_view"]
 
         if tb & 1:
             self.toolbarfile.setVisible(True)
@@ -2238,7 +2238,7 @@ class MainGUI(QtWidgets.QMainWindow):
             self.toolbarshell.setVisible(False)
 
     def on_tab_setup_context_menu(self):
-        initial_checked = self.app.options["global_tabs_detachable"]
+        initial_checked = self.app.defaults["global_tabs_detachable"]
         action_name = str(_("Detachable Tabs"))
         action = QtGui.QAction(self)
         action.setCheckable(True)
@@ -2256,17 +2256,17 @@ class MainGUI(QtWidgets.QMainWindow):
 
     def on_detachable_tab_rmb_click(self, checked):
         self.notebook.set_detachable(val=checked)
-        self.app.options["global_tabs_detachable"] = checked
+        self.app.defaults["global_tabs_detachable"] = checked
 
         self.plot_tab_area.set_detachable(val=checked)
-        self.app.options["global_tabs_detachable"] = checked
+        self.app.defaults["global_tabs_detachable"] = checked
 
     def build_infobar_context_menu(self):
         delta_coords_action_name = str(_("Delta Coordinates Toolbar"))
         delta_coords_action = QtGui.QAction(self)
         delta_coords_action.setCheckable(True)
         delta_coords_action.setText(delta_coords_action_name)
-        delta_coords_action.setChecked(self.app.options["global_delta_coordsbar_show"])
+        delta_coords_action.setChecked(self.app.defaults["global_delta_coordsbar_show"])
         self.infobar.addAction(delta_coords_action)
         delta_coords_action.triggered.connect(self.toggle_delta_coords)
 
@@ -2274,7 +2274,7 @@ class MainGUI(QtWidgets.QMainWindow):
         coords_action = QtGui.QAction(self)
         coords_action.setCheckable(True)
         coords_action.setText(coords_action_name)
-        coords_action.setChecked(self.app.options["global_coordsbar_show"])
+        coords_action.setChecked(self.app.defaults["global_coordsbar_show"])
         self.infobar.addAction(coords_action)
         coords_action.triggered.connect(self.toggle_coords)
 
@@ -2282,7 +2282,7 @@ class MainGUI(QtWidgets.QMainWindow):
         grid_action = QtGui.QAction(self)
         grid_action.setCheckable(True)
         grid_action.setText(grid_action_name)
-        grid_action.setChecked(self.app.options["global_gridbar_show"])
+        grid_action.setChecked(self.app.defaults["global_gridbar_show"])
         self.infobar.addAction(grid_action)
         grid_action.triggered.connect(self.toggle_gridbar)
 
@@ -2290,24 +2290,24 @@ class MainGUI(QtWidgets.QMainWindow):
         status_action = QtGui.QAction(self)
         status_action.setCheckable(True)
         status_action.setText(status_action_name)
-        status_action.setChecked(self.app.options["global_statusbar_show"])
+        status_action.setChecked(self.app.defaults["global_statusbar_show"])
         self.infobar.addAction(status_action)
         status_action.triggered.connect(self.toggle_statusbar)
 
     def toggle_coords(self, checked):
-        self.app.options["global_coordsbar_show"] = checked
+        self.app.defaults["global_coordsbar_show"] = checked
         self.coords_toolbar.setVisible(checked)
 
     def toggle_delta_coords(self, checked):
-        self.app.options["global_delta_coordsbar_show"] = checked
+        self.app.defaults["global_delta_coordsbar_show"] = checked
         self.delta_coords_toolbar.setVisible(checked)
 
     def toggle_gridbar(self, checked):
-        self.app.options["global_gridbar_show"] = checked
+        self.app.defaults["global_gridbar_show"] = checked
         self.grid_toolbar.setVisible(checked)
 
     def toggle_statusbar(self, checked):
-        self.app.options["global_statusbar_show"] = checked
+        self.app.defaults["global_statusbar_show"] = checked
         self.status_toolbar.setVisible(checked)
 
     def on_preferences_open_folder(self):
@@ -2770,10 +2770,10 @@ class MainGUI(QtWidgets.QMainWindow):
             for tb in self.findChildren(QtWidgets.QToolBar):
                 tb.setVisible(False)
 
-            self.coords_toolbar.setVisible(self.app.options["global_coordsbar_show"])
-            self.delta_coords_toolbar.setVisible(self.app.options["global_delta_coordsbar_show"])
-            self.grid_toolbar.setVisible(self.app.options["global_gridbar_show"])
-            self.status_toolbar.setVisible(self.app.options["global_statusbar_show"])
+            self.coords_toolbar.setVisible(self.app.defaults["global_coordsbar_show"])
+            self.delta_coords_toolbar.setVisible(self.app.defaults["global_delta_coordsbar_show"])
+            self.grid_toolbar.setVisible(self.app.defaults["global_gridbar_show"])
+            self.status_toolbar.setVisible(self.app.defaults["global_statusbar_show"])
 
             self.splitter.setSizes([0, 1])
             self.toggle_fscreen = True
@@ -3381,11 +3381,11 @@ class MainGUI(QtWidgets.QMainWindow):
 
                 # Zoom In
                 if key == QtCore.Qt.Key.Key_Equal:
-                    self.app.plotcanvas.zoom(1 / self.app.options['global_zoom_ratio'], self.app.mouse)
+                    self.app.plotcanvas.zoom(1 / self.app.defaults['global_zoom_ratio'], self.app.mouse)
 
                 # Zoom Out
                 if key == QtCore.Qt.Key.Key_Minus:
-                    self.app.plotcanvas.zoom(self.app.options['global_zoom_ratio'], self.app.mouse)
+                    self.app.plotcanvas.zoom(self.app.defaults['global_zoom_ratio'], self.app.mouse)
 
                 # toggle display of Notebook area
                 if key == QtCore.Qt.Key.Key_QuoteLeft:
@@ -3513,12 +3513,12 @@ class MainGUI(QtWidgets.QMainWindow):
 
                 # Zoom Out
                 if key == QtCore.Qt.Key.Key_Minus or key == '-':
-                    self.app.plotcanvas.zoom(1 / self.app.options['global_zoom_ratio'],
+                    self.app.plotcanvas.zoom(1 / self.app.defaults['global_zoom_ratio'],
                                              [self.app.geo_editor.snap_x, self.app.geo_editor.snap_y])
 
                 # Zoom In
                 if key == QtCore.Qt.Key.Key_Equal or key == '=':
-                    self.app.plotcanvas.zoom(self.app.options['global_zoom_ratio'],
+                    self.app.plotcanvas.zoom(self.app.defaults['global_zoom_ratio'],
                                              [self.app.geo_editor.snap_x, self.app.geo_editor.snap_y])
 
                 # Switch to Project Tab
@@ -3750,13 +3750,13 @@ class MainGUI(QtWidgets.QMainWindow):
 
                 if key == QtCore.Qt.Key.Key_Minus or key == '-':
                     self.app.grb_editor.launched_from_shortcuts = True
-                    self.app.plotcanvas.zoom(1 / self.app.options['global_zoom_ratio'],
+                    self.app.plotcanvas.zoom(1 / self.app.defaults['global_zoom_ratio'],
                                              [self.app.grb_editor.snap_x, self.app.grb_editor.snap_y])
                     return
 
                 if key == QtCore.Qt.Key.Key_Equal or key == '=':
                     self.app.grb_editor.launched_from_shortcuts = True
-                    self.app.plotcanvas.zoom(self.app.options['global_zoom_ratio'],
+                    self.app.plotcanvas.zoom(self.app.defaults['global_zoom_ratio'],
                                              [self.app.grb_editor.snap_x, self.app.grb_editor.snap_y])
                     return
 
@@ -3978,13 +3978,13 @@ class MainGUI(QtWidgets.QMainWindow):
 
                 if key == QtCore.Qt.Key.Key_Minus or key == '-':
                     self.app.exc_editor.launched_from_shortcuts = True
-                    self.app.plotcanvas.zoom(1 / self.app.options['global_zoom_ratio'],
+                    self.app.plotcanvas.zoom(1 / self.app.defaults['global_zoom_ratio'],
                                              [self.app.exc_editor.snap_x, self.app.exc_editor.snap_y])
                     return
 
                 if key == QtCore.Qt.Key.Key_Equal or key == '=':
                     self.app.exc_editor.launched_from_shortcuts = True
-                    self.app.plotcanvas.zoom(self.app.options['global_zoom_ratio'],
+                    self.app.plotcanvas.zoom(self.app.defaults['global_zoom_ratio'],
                                              [self.app.exc_editor.snap_x, self.app.exc_editor.snap_y])
                     return
 
diff --git a/appGUI/PlotCanvas.py b/appGUI/PlotCanvas.py
index 4c6c4271..7f8e59f3 100644
--- a/appGUI/PlotCanvas.py
+++ b/appGUI/PlotCanvas.py
@@ -139,9 +139,9 @@ class PlotCanvas(QtCore.QObject, VisPyCanvas):
         #                            parent=self.view.scene)
 
         self.v_line = InfiniteLine(pos=0, color=axis_color, vertical=True, line_width=1.5,
-                                   parent=self.view.scene)
+                                   parent=None)
         self.h_line = InfiniteLine(pos=0, color=axis_color, vertical=False, line_width=1.5,
-                                   parent=self.view.scene)
+                                   parent=None)
 
         self.line_parent = None
         if self.fcapp.options["global_cursor_color_enabled"]:
@@ -179,10 +179,11 @@ class PlotCanvas(QtCore.QObject, VisPyCanvas):
             self.on_toggle_hud(state=True, silent=True)
 
         # Axis Display
-        self.axis_enabled = True
+        self.axis_enabled = False
 
         # enable Axis
-        self.on_toggle_axis(state=True, silent=True)
+        if self.fcapp.options['global_axis'] is True:
+            self.on_toggle_axis(state=True, silent=True)
 
         # enable Grid lines
         self.grid_lines_enabled = True
@@ -229,7 +230,7 @@ class PlotCanvas(QtCore.QObject, VisPyCanvas):
 
         if state:
             self.axis_enabled = True
-            self.fcapp.options['global_axis'] = True
+            self.fcapp.defaults['global_axis'] = True
             self.v_line.parent = self.view.scene
             self.h_line.parent = self.view.scene
             self.fcapp.ui.axis_status_label.setStyleSheet("""
@@ -243,7 +244,7 @@ class PlotCanvas(QtCore.QObject, VisPyCanvas):
                 self.fcapp.inform[str, bool].emit(_("Axis enabled."), False)
         else:
             self.axis_enabled = False
-            self.fcapp.options['global_axis'] = False
+            self.fcapp.defaults['global_axis'] = False
             self.v_line.parent = None
             self.h_line.parent = None
             self.fcapp.ui.axis_status_label.setStyleSheet("")
@@ -277,7 +278,7 @@ class PlotCanvas(QtCore.QObject, VisPyCanvas):
             self.hud_enabled = True
             self.rect_hud.parent = self.view
             self.text_hud.parent = self.view
-            self.fcapp.options['global_hud'] = True
+            self.fcapp.defaults['global_hud'] = True
             self.fcapp.ui.hud_label.setStyleSheet("""
                                                   QLabel
                                                   {
@@ -292,7 +293,7 @@ class PlotCanvas(QtCore.QObject, VisPyCanvas):
             self.hud_enabled = False
             self.rect_hud.parent = None
             self.text_hud.parent = None
-            self.fcapp.options['global_hud'] = False
+            self.fcapp.defaults['global_hud'] = False
             self.fcapp.ui.hud_label.setStyleSheet("")
             if silent is None:
                 self.fcapp.inform[str, bool].emit(_("HUD disabled."), False)
@@ -386,14 +387,14 @@ class PlotCanvas(QtCore.QObject, VisPyCanvas):
             color = '#dededeff'
 
         if state:
-            self.fcapp.options['global_grid_lines'] = True
+            self.fcapp.defaults['global_grid_lines'] = True
             self.grid_lines_enabled = True
             # self.grid.parent = self.view.scene
             self.grid._grid_color_fn['color'] = Color(color).rgba
             if silent is None:
                 self.fcapp.inform[str, bool].emit(_("Grid enabled."), False)
         else:
-            self.fcapp.options['global_grid_lines'] = False
+            self.fcapp.defaults['global_grid_lines'] = False
             self.grid_lines_enabled = False
             # self.grid.parent = None
             self.grid._grid_color_fn['color'] = Color('#FFFFFFFF').rgba
diff --git a/appGUI/PlotCanvasLegacy.py b/appGUI/PlotCanvasLegacy.py
index a5c7e0ac..15a4a2b5 100644
--- a/appGUI/PlotCanvasLegacy.py
+++ b/appGUI/PlotCanvasLegacy.py
@@ -248,8 +248,8 @@ class PlotCanvasLegacy(QtCore.QObject):
         axis_color = axis_color[0], axis_color[1], axis_color[2]
 
         # self.h_line = self.axes.axhline(color=(0.70, 0.3, 0.3), linewidth=2)
-        self.h_line = self.axes.axhline(color=axis_color, linewidth=2)
-        self.v_line = self.axes.axvline(color=axis_color, linewidth=2)
+        self.h_line = None
+        self.v_line = None
 
         self.axes.tick_params(axis='x', color=tick_color, labelcolor=tick_color)
         self.axes.tick_params(axis='y', color=tick_color, labelcolor=tick_color)
@@ -334,17 +334,18 @@ class PlotCanvasLegacy(QtCore.QObject):
             self.draw_workspace(workspace_size=self.app.options["global_workspaceT"])
 
         # Axis Display
-        self.axis_enabled = True
+        self.axis_enabled = False
 
         # enable Axis
-        self.on_toggle_axis(state=True, silent=True)
-        self.app.ui.axis_status_label.setStyleSheet("""
-                                                    QLabel
-                                                    {
-                                                        color: black;
-                                                        background-color: orange;
-                                                    }
-                                                    """)
+        if self.app.options['global_axis'] is True:
+            self.on_toggle_axis(state=True, silent=True)
+            self.app.ui.axis_status_label.setStyleSheet("""
+                                                        QLabel
+                                                        {
+                                                            color: black;
+                                                            background-color: orange;
+                                                        }
+                                                        """)
 
         # Attach to parent
         self.native = self.canvas  # for API compatibility with 3D plotcanvas
@@ -380,7 +381,7 @@ class PlotCanvasLegacy(QtCore.QObject):
 
         if state:
             self.axis_enabled = True
-            self.app.options['global_axis'] = True
+            self.app.defaults['global_axis'] = True
             if self.h_line not in self.axes.lines and self.v_line not in self.axes.lines:
                 self.h_line = self.axes.axhline(color=(0.70, 0.3, 0.3), linewidth=2)
                 self.v_line = self.axes.axvline(color=(0.70, 0.3, 0.3), linewidth=2)
@@ -395,7 +396,7 @@ class PlotCanvasLegacy(QtCore.QObject):
                     self.app.inform[str, bool].emit(_("Axis enabled."), False)
         else:
             self.axis_enabled = False
-            self.app.options['global_axis'] = False
+            self.app.defaults['global_axis'] = False
             if self.h_line in self.axes.lines and self.v_line in self.axes.lines:
                 self.axes.lines.remove(self.h_line)
                 self.axes.lines.remove(self.v_line)
@@ -412,7 +413,7 @@ class PlotCanvasLegacy(QtCore.QObject):
         if state:
             self.hud_enabled = True
             self.text_hud.add_artist()
-            self.app.options['global_hud'] = True
+            self.app.defaults['global_hud'] = True
 
             self.app.ui.hud_label.setStyleSheet("""
                                                 QLabel
@@ -426,7 +427,7 @@ class PlotCanvasLegacy(QtCore.QObject):
         else:
             self.hud_enabled = False
             self.text_hud.remove_artist()
-            self.app.options['global_hud'] = False
+            self.app.defaults['global_hud'] = False
             self.app.ui.hud_label.setStyleSheet("")
             if silent is None:
                 self.app.inform[str, bool].emit(_("HUD disabled."), False)
diff --git a/appGUI/preferences/utilities/AutoCompletePrefGroupUI.py b/appGUI/preferences/utilities/AutoCompletePrefGroupUI.py
index 478e9f77..ee8f2e88 100644
--- a/appGUI/preferences/utilities/AutoCompletePrefGroupUI.py
+++ b/appGUI/preferences/utilities/AutoCompletePrefGroupUI.py
@@ -14,13 +14,13 @@ if '_' not in builtins.__dict__:
 
 
 class AutoCompletePrefGroupUI(OptionsGroupUI):
-    def __init__(self, defaults, decimals=4, parent=None):
+    def __init__(self, app, parent=None):
         # OptionsGroupUI.__init__(self, "Gerber File associations Preferences", parent=None)
         super().__init__(self, parent=parent)
 
         self.setTitle(str(_("Autocompleter Keywords")))
-        self.decimals = decimals
-        self.defaults = defaults
+        self.decimals = app.decimals
+        self.options = app.options
 
         self.restore_btn = FCButton(_("Restore"))
         self.restore_btn.setToolTip(_("Restore the autocompleter keywords list to the default state."))
diff --git a/appGUI/preferences/utilities/FAExcPrefGroupUI.py b/appGUI/preferences/utilities/FAExcPrefGroupUI.py
index db764123..8e3c1c8e 100644
--- a/appGUI/preferences/utilities/FAExcPrefGroupUI.py
+++ b/appGUI/preferences/utilities/FAExcPrefGroupUI.py
@@ -14,13 +14,13 @@ if '_' not in builtins.__dict__:
 
 
 class FAExcPrefGroupUI(OptionsGroupUI):
-    def __init__(self, defaults, decimals=4, parent=None):
+    def __init__(self, app, parent=None):
         # OptionsGroupUI.__init__(self, "Excellon File associations Preferences", parent=None)
         super().__init__(self, parent=parent)
 
         self.setTitle(str(_("Excellon File associations")))
-        self.decimals = decimals
-        self.defaults = defaults
+        self.decimals = app.decimals
+        self.options = app.options
 
         self.layout.setContentsMargins(2, 2, 2, 2)
 
diff --git a/appGUI/preferences/utilities/FAGcoPrefGroupUI.py b/appGUI/preferences/utilities/FAGcoPrefGroupUI.py
index 5a8966e9..84697c77 100644
--- a/appGUI/preferences/utilities/FAGcoPrefGroupUI.py
+++ b/appGUI/preferences/utilities/FAGcoPrefGroupUI.py
@@ -1,6 +1,7 @@
 from PyQt6 import QtWidgets, QtGui
 from PyQt6.QtCore import QSettings
 
+import appGUI.preferences.OptionsGroupUI
 from appGUI.GUIElements import FCButton, FCTextArea, FCEntry, FCLabel
 from appGUI.preferences.OptionsGroupUI import OptionsGroupUI
 
@@ -14,13 +15,13 @@ if '_' not in builtins.__dict__:
 
 
 class FAGcoPrefGroupUI(OptionsGroupUI):
-    def __init__(self, defaults, decimals=4, parent=None):
+    def __init__(self, app, parent=None):
         # OptionsGroupUI.__init__(self, "Gcode File associations Preferences", parent=None)
         super(FAGcoPrefGroupUI, self).__init__(self, parent=parent)
 
         self.setTitle(str(_("GCode File associations")))
-        self.decimals = decimals
-        self.defaults = defaults
+        self.decimals = app.decimals
+        self.options = app.options
 
         self.restore_btn = FCButton(_("Restore"))
         self.restore_btn.setToolTip(_("Restore the extension list to the default state."))
diff --git a/appGUI/preferences/utilities/FAGrbPrefGroupUI.py b/appGUI/preferences/utilities/FAGrbPrefGroupUI.py
index b9d86f6e..fe1dbf53 100644
--- a/appGUI/preferences/utilities/FAGrbPrefGroupUI.py
+++ b/appGUI/preferences/utilities/FAGrbPrefGroupUI.py
@@ -14,13 +14,13 @@ if '_' not in builtins.__dict__:
 
 
 class FAGrbPrefGroupUI(OptionsGroupUI):
-    def __init__(self, defaults, decimals=4, parent=None):
+    def __init__(self, app, parent=None):
         # OptionsGroupUI.__init__(self, "Gerber File associations Preferences", parent=None)
         super(FAGrbPrefGroupUI, self).__init__(self, parent=parent)
 
         self.setTitle(str(_("Gerber File associations")))
-        self.decimals = decimals
-        self.defaults = defaults
+        self.decimals = app.decimals
+        self.options = app.options
 
         self.restore_btn = FCButton(_("Restore"))
         self.restore_btn.setToolTip(_("Restore the extension list to the default state."))
diff --git a/appGUI/preferences/utilities/UtilPreferencesUI.py b/appGUI/preferences/utilities/UtilPreferencesUI.py
index 5fff0f19..0fcea020 100644
--- a/appGUI/preferences/utilities/UtilPreferencesUI.py
+++ b/appGUI/preferences/utilities/UtilPreferencesUI.py
@@ -9,23 +9,21 @@ from appGUI.preferences.utilities.FAExcPrefGroupUI import FAExcPrefGroupUI
 
 class UtilPreferencesUI(QtWidgets.QWidget):
 
-    def __init__(self, defaults, decimals, parent=None):
+    def __init__(self, app, parent=None):
         QtWidgets.QWidget.__init__(self, parent=parent)
         self.layout = QtWidgets.QHBoxLayout()
         self.setLayout(self.layout)
-        self.decimals = decimals
-        self.defaults = defaults
 
-        self.fa_excellon_group = FAExcPrefGroupUI(decimals=self.decimals, defaults=self.defaults)
+        self.fa_excellon_group = FAExcPrefGroupUI(app=app)
         self.fa_excellon_group.setMinimumWidth(260)
 
-        self.fa_gcode_group = FAGcoPrefGroupUI(decimals=self.decimals, defaults=self.defaults)
+        self.fa_gcode_group = FAGcoPrefGroupUI(app=app)
         self.fa_gcode_group.setMinimumWidth(260)
 
-        self.fa_gerber_group = FAGrbPrefGroupUI(decimals=self.decimals, defaults=self.defaults)
+        self.fa_gerber_group = FAGrbPrefGroupUI(app=app)
         self.fa_gerber_group.setMinimumWidth(260)
 
-        self.kw_group = AutoCompletePrefGroupUI(decimals=self.decimals, defaults=self.defaults)
+        self.kw_group = AutoCompletePrefGroupUI(app=app)
         self.kw_group.setMinimumWidth(260)
 
         # this does not make sense in Linux and MacOs so w edo not display it for those OS's
diff --git a/app_Main.py b/app_Main.py
index c25cf8bb..4ffb1bbc 100644
--- a/app_Main.py
+++ b/app_Main.py
@@ -1358,7 +1358,7 @@ class App(QtCore.QObject):
         # ##################################### FIRST RUN SECTION ###################################################
         # ################################ It's done only once after install   #####################################
         # ###########################################################################################################
-        if self.options["first_run"] is True:
+        if self.defaults["first_run"] is True:
             # ONLY AT FIRST STARTUP INIT THE GUI LAYOUT TO 'minimal'
             self.log.debug("-> First Run: Setting up the first Layout")
             initial_lay = 'minimal'
@@ -1369,7 +1369,7 @@ class App(QtCore.QObject):
             self.ui.general_pref_form.general_gui_group.layout_combo.setCurrentIndex(idx)
 
             # after the first run, this object should be False
-            self.options["first_run"] = False
+            self.defaults["first_run"] = False
             self.log.debug("-> First Run: Updating the Defaults file with Factory Defaults")
             self.preferencesUiManager.save_defaults(silent=True)
 
diff --git a/defaults.py b/defaults.py
index 3d72a211..1b6b2695 100644
--- a/defaults.py
+++ b/defaults.py
@@ -87,7 +87,7 @@ class FlatCAMDefaults:
         "global_log_verbose": 2,
         "global_portable": False,
 
-        "global_languages": ['English', 'Romanian'],
+        "global_languages": ['English'],
         "global_language_current": 'English',
 
         "global_systray_icon": True,
@@ -95,7 +95,7 @@ class FlatCAMDefaults:
         "global_project_at_startup": False,
         "global_version_check": True,
         "global_send_stats": True,
-        "global_worker_number": int((os.cpu_count()) / 2) if os.cpu_count() > 4 else 2,
+        "global_worker_number": int((os.cpu_count()) / 2) if os.cpu_count() > 4 else 1,
         "global_tolerance": 0.005,
 
         "global_save_compressed": True,