diff --git a/Interface/AppUI.py b/Interface/AppUI.py
index 61b017d..1eca962 100644
--- a/Interface/AppUI.py
+++ b/Interface/AppUI.py
@@ -122,10 +122,10 @@ def __template_selection_changed(self, _event):
             self.showTemplate(self.szablony[selected[0]])
 
     def __group_doubleclicked(self, _event):
-        selected = self.grupy_listbox.curselection()
+        selected: int = self.grupy_listbox.curselection()
         if len(selected) > 0:
-            elem = int(self.grupy_listbox.get(selected[0]).split(':')[0])
-            self.show_group_window(self.grupy[elem])
+            g: Group = self.grupy[selected[0]]
+            self.show_group_window(g)
 
     def __group_selection_changed(self, _event):
         selected: int = self.grupy_listbox.curselection()
diff --git a/grupy.txt b/grupy.txt
deleted file mode 100644
index 78e7b20..0000000
--- a/grupy.txt
+++ /dev/null
@@ -1 +0,0 @@
-1:kh@onet.pl, mk@gmail.com