fix a lot of Tkinter imports
diff --git a/Demo/tkinter/matt/not-what-you-might-think-1.py b/Demo/tkinter/matt/not-what-you-might-think-1.py
index 7b20f02..85c65c8 100644
--- a/Demo/tkinter/matt/not-what-you-might-think-1.py
+++ b/Demo/tkinter/matt/not-what-you-might-think-1.py
@@ -1,4 +1,4 @@
-from Tkinter import *
+from tkinter import *
 
 
 class Test(Frame):