diff --git a/Demo/tkinter/guido/ManPage.py b/Demo/tkinter/guido/ManPage.py
index 911961e..221af88 100755
--- a/Demo/tkinter/guido/ManPage.py
+++ b/Demo/tkinter/guido/ManPage.py
@@ -1,6 +1,6 @@
 # Widget to display a man page
 
-import regex
+import re
 from Tkinter import *
 from Tkinter import _tkinter
 from ScrolledText import ScrolledText
@@ -11,10 +11,10 @@
 
 # XXX Recognizing footers is system dependent
 # (This one works for IRIX 5.2 and Solaris 2.2)
-footerprog = regex.compile(
+footerprog = re.compile(
         '^     Page [1-9][0-9]*[ \t]+\|^.*Last change:.*[1-9][0-9]*\n')
-emptyprog = regex.compile('^[ \t]*\n')
-ulprog = regex.compile('^[ \t]*[Xv!_][Xv!_ \t]*\n')
+emptyprog = re.compile('^[ \t]*\n')
+ulprog = re.compile('^[ \t]*[Xv!_][Xv!_ \t]*\n')
 
 # Basic Man Page class -- does not disable editing
 class EditableManPage(ScrolledText):
diff --git a/Demo/tkinter/guido/mbox.py b/Demo/tkinter/guido/mbox.py
index 9b16f6b..3c36d88 100755
--- a/Demo/tkinter/guido/mbox.py
+++ b/Demo/tkinter/guido/mbox.py
@@ -4,7 +4,7 @@
 
 import os
 import sys
-import regex
+import re
 import getopt
 import string
 import mhlib
@@ -157,7 +157,7 @@
     scanmenu.unpost()
     scanmenu.invoke('active')
 
-scanparser = regex.compile('^ *\([0-9]+\)')
+scanparser = re.compile('^ *([0-9]+)')
 
 def open_folder(e=None):
     global folder, mhf
diff --git a/Demo/tkinter/guido/tkman.py b/Demo/tkinter/guido/tkman.py
index 11d9690..6b0b641 100755
--- a/Demo/tkinter/guido/tkman.py
+++ b/Demo/tkinter/guido/tkman.py
@@ -5,7 +5,7 @@
 import sys
 import os
 import string
-import regex
+import re
 from Tkinter import *
 from ManPage import ManPage
 
@@ -208,15 +208,15 @@
             print 'Empty search string'
             return
         if not self.casevar.get():
-            map = regex.casefold
+            map = re.IGNORECASE
         else:
             map = None
         try:
             if map:
-                prog = regex.compile(search, map)
+                prog = re.compile(search, map)
             else:
-                prog = regex.compile(search)
-        except regex.error, msg:
+                prog = re.compile(search)
+        except re.error, msg:
             self.frame.bell()
             print 'Regex error:', msg
             return