diff --git a/CHANGELOG.md b/CHANGELOG.md
index c396afa9..3a007cf6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,8 @@ CHANGELOG for FlatCAM beta
 - Tool Isolation - added a GUI element to control if the isolation of a polygon, when done with rest, should be done with the current tool even if its interiors (holes in it) could not be isolated or to be left for the next tool
 - updated all the translation strings to the latest changes
 - small fix
+- fixed the color set for the application objects
+- made some reverts regarding the mods in the quit_application() method - problems when freezed
 RELEASE 8.993
 
 4.06.2020
diff --git a/FlatCAM.py b/FlatCAM.py
index 0b2d0b88..934a0bb4 100644
--- a/FlatCAM.py
+++ b/FlatCAM.py
@@ -17,6 +17,7 @@ if sys.platform == "win32":
 MIN_VERSION_MAJOR = 3
 MIN_VERSION_MINOR = 5
 
+
 def debug_trace():
     """
     Set a tracepoint in the Python debugger that works with Qt
diff --git a/appTranslation.py b/appTranslation.py
index eead1e25..47c0ee9c 100644
--- a/appTranslation.py
+++ b/appTranslation.py
@@ -174,6 +174,7 @@ def restart_program(app, ask=None):
     Note: this function does not return. Any cleanup action (like
     saving data) must be done before calling this function.
     """
+    log.debug("FlatCAMTranslation.restart_program()")
 
     theme_settings = QSettings("Open Source", "FlatCAM")
     if theme_settings.contains("theme"):
@@ -188,9 +189,9 @@ def restart_program(app, ask=None):
 
     # try to quit the Socket opened by ArgsThread class
     try:
-        # app.new_launch.stop.emit()
-        app.new_launch.thread_exit = True
-        app.new_launch.listener.close()
+        app.new_launch.stop.emit()
+        # app.new_launch.thread_exit = True
+        # app.new_launch.listener.close()
     except Exception as err:
         log.debug("FlatCAMTranslation.restart_program() --> %s" % str(err))
 
diff --git a/app_Main.py b/app_Main.py
index 199e292c..8854eb40 100644
--- a/app_Main.py
+++ b/app_Main.py
@@ -264,8 +264,6 @@ class App(QtCore.QObject):
     # graphic residues behind
     cleanup = pyqtSignal()
 
-    listen_th = QtCore.QThread()
-
     def __init__(self, user_defaults=True):
         """
         Starts the application.
@@ -278,13 +276,12 @@ class App(QtCore.QObject):
 
         App.log.info("FlatCAM Starting...")
 
-        self.main_thread = QtWidgets.QApplication.instance().thread()
-
         # ############################################################################################################
         # ################# Setup the listening thread for another instance launching with args ######################
         # ############################################################################################################
         if sys.platform == 'win32' or sys.platform == 'linux':
             # make sure the thread is stored by using a self. otherwise it's garbage collected
+            self.listen_th = QtCore.QThread()
             self.listen_th.start(priority=QtCore.QThread.LowestPriority)
 
             self.new_launch = ArgsThread()
@@ -605,6 +602,8 @@ class App(QtCore.QObject):
         self.project_filename = None
         self.toggle_units_ignore = False
 
+        self.main_thread = QtWidgets.QApplication.instance().thread()
+
         # ###########################################################################################################
         # ########################################## LOAD LANGUAGES  ################################################
         # ###########################################################################################################
@@ -3349,21 +3348,21 @@ class App(QtCore.QObject):
 
         # try to quit the Socket opened by ArgsThread class
         try:
-            self.new_launch.thread_exit = True
-            self.new_launch.listener.close()
+            # self.new_launch.thread_exit = True
+            # self.new_launch.listener.close()
             self.new_launch.stop.emit()
         except Exception as err:
             log.debug("App.quit_application() --> %s" % str(err))
 
         # try to quit the QThread that run ArgsThread class
         try:
-            del self.new_launch
-            self.listen_th.terminate()
+            # del self.new_launch
+            self.listen_th.quit()
         except Exception as e:
             log.debug("App.quit_application() --> %s" % str(e))
 
         # terminate workers
-        self.workers.__del__()
+        # self.workers.__del__()
         self.clear_pool()
 
         # quit app by signalling for self.kill_app() method
@@ -9754,9 +9753,9 @@ class App(QtCore.QObject):
         for sel_obj in sel_obj_list:
             if sel_obj.kind == 'excellon':
                 alpha_level = str(hex(
-                    self.ui.excellon_defaults_form.excellon_gen_group.color_alpha_slider.value())[2:])
+                    self.ui.excellon_defaults_form.excellon_gen_group.excellon_alpha_entry.get_value())[2:])
             elif sel_obj.kind == 'gerber':
-                alpha_level = str(hex(self.ui.gerber_defaults_form.gerber_gen_group.pf_color_alpha_slider.value())[2:])
+                alpha_level = str(hex(self.ui.gerber_defaults_form.gerber_gen_group.gerber_alpha_entry.get_value())[2:])
             elif sel_obj.kind == 'geometry':
                 alpha_level = 'FF'
             else: