diff --git a/gui_handler.py b/gui_handler.py
index 25ee200..9e119a9 100644
--- a/gui_handler.py
+++ b/gui_handler.py
@@ -3,19 +3,19 @@ import util
 
 app = QtWidgets.QApplication([])
 
-class Window:
-    def __init__(self, title="Concorde", size_x=640, size_y=480):
-        self.window = QtWidgets.QWidget()
-        self.window.setWindowTitle(title)
-        self.window.resize(size_x, size_y)
-        self.window.show()
+class Window(QtWidgets.QMainWindow):
+    def __init__(self, size=(640, 480), title="Concorde"):
+        super().__init__()
+        self.setWindowTitle(title)
+        self.resize(size[0], size[1])
+        self.show()
 
     def __del__(self):
         #TODO: whatever needs to be done here
         pass
 
     def set_title(self, title):
-        self.window.setWindowTitle(title)
+        self.setWindowTitle(title)
 
     def get_size(self):
         #TODO: implement
@@ -23,11 +23,28 @@ class Window:
         return None
 
     def set_size(self, size_x, size_y):
-        self.window.resize(size_x, size_y)
+        self.resize(size_x, size_y)
 
     def update_menus(self, menu_dict):
-        #TODO: implement
-        util.warn("Not implemented!")
+        menu = self.menuBar()
+        #Looping through entire menu_dict
+        for topmenu, submenu in menu_dict.items():
+            #making top level menu
+            menu_item = menu.addMenu(topmenu)
+
+            #adding menu items (populating menu)
+            for inner, data in submenu.items():
+                #Adding submenu and populating it
+                if type(data) == dict:
+                    sub = menu_item.addMenu(inner)
+                    for label, func in data.items():
+                        sub.addAction(label)
+                #Adding separators
+                elif inner == None:
+                    menu_item.addSeparator()
+                else:    
+                    menu_item.addAction(inner)
+    
 
 #TODO: This needs to run in a thread but Qt really doesn't want it to. There are two ways around this:
 #   - create the QtWidgets.QApplication inside a thread and run all QT stuff inside that thread
diff --git a/main.py b/main.py
index 0d7ba07..70f34a2 100644
--- a/main.py
+++ b/main.py
@@ -26,11 +26,18 @@ configuration = Config(configuration_file_path, default_configuration)
 # PROGRAM MAIN WINDOW
 ################################################################################
 
+# It seems like opening multiple instances already works as intended
+
 main_window = gui_handler.Window()
+main_window2 = gui_handler.Window()
 main_window.set_title("Concorde IDE")
+main_window2.set_title("Another window")
 main_window.set_size(configuration.get_configuration_value("window size")["x"], configuration.get_configuration_value("window size")["y"])
+main_window2.set_size(400, 500)
 
 main_window.update_menus(gui_helper.menu_structure)
+main_window2.update_menus(gui_helper.menu_structure)
+
 
 #TODO: get resolution of main window on exit and save it back to the configuration
 #TODO: check if the GUI encountered an error in a toolkit agnostic way