diff --git a/collects/repos-time-stamp/stamp.ss b/collects/repos-time-stamp/stamp.ss
index e53443d52b..d93619c4f3 100644
--- a/collects/repos-time-stamp/stamp.ss
+++ b/collects/repos-time-stamp/stamp.ss
@@ -1 +1 @@
-#lang scheme/base (provide stamp) (define stamp "16may2009")
+#lang scheme/base (provide stamp) (define stamp "17may2009")
diff --git a/src/worksp/mred/mred.manifest b/src/worksp/mred/mred.manifest
index 3fa6665bec..d2830a183a 100644
--- a/src/worksp/mred/mred.manifest
+++ b/src/worksp/mred/mred.manifest
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8" standalone="yes"?> 
 <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0"> 
 <assemblyIdentity 
-version="4.1.5.5" 
+version="4.2.0.1" 
 processorArchitecture="X86" 
 name="Org.PLT-Scheme.MrEd" 
 type="win32" 
diff --git a/src/worksp/mred/mred.rc b/src/worksp/mred/mred.rc
index dcc4b54585..89790d5c36 100644
--- a/src/worksp/mred/mred.rc
+++ b/src/worksp/mred/mred.rc
@@ -20,8 +20,8 @@ APPLICATION             ICON    DISCARDABLE     "mred.ico"
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 4,1,5,5
- PRODUCTVERSION 4,1,5,5
+ FILEVERSION 4,2,0,1
+ PRODUCTVERSION 4,2,0,1
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -39,11 +39,11 @@ BEGIN
             VALUE "CompanyName", "PLT Scheme Inc.\0"
             VALUE "FileDescription", "PLT Scheme GUI application\0"
             VALUE "InternalName", "MrEd\0"
-            VALUE "FileVersion", "4, 1, 5, 5\0"
+            VALUE "FileVersion", "4, 2, 0, 1\0"
             VALUE "LegalCopyright", "Copyright © 1995-2009\0"
             VALUE "OriginalFilename", "MrEd.exe\0"
             VALUE "ProductName", "PLT Scheme\0"
-            VALUE "ProductVersion", "4, 1, 5, 5\0"
+            VALUE "ProductVersion", "4, 2, 0, 1\0"
         END
     END
     BLOCK "VarFileInfo"
diff --git a/src/worksp/mzcom/mzcom.rc b/src/worksp/mzcom/mzcom.rc
index 53079e8508..9db8bbe41f 100644
--- a/src/worksp/mzcom/mzcom.rc
+++ b/src/worksp/mzcom/mzcom.rc
@@ -53,8 +53,8 @@ END
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 4,1,5,5
- PRODUCTVERSION 4,1,5,5
+ FILEVERSION 4,2,0,1
+ PRODUCTVERSION 4,2,0,1
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -70,12 +70,12 @@ BEGIN
         BLOCK "040904b0"
         BEGIN
             VALUE "FileDescription", "MzCOM Module"
-            VALUE "FileVersion", "4, 1, 5, 5"
+            VALUE "FileVersion", "4, 2, 0, 1"
             VALUE "InternalName", "MzCOM"
             VALUE "LegalCopyright", "Copyright 2000-2009 PLT (Paul Steckler)"
             VALUE "OriginalFilename", "MzCOM.EXE"
             VALUE "ProductName", "MzCOM Module"
-            VALUE "ProductVersion", "4, 1, 5, 5"
+            VALUE "ProductVersion", "4, 2, 0, 1"
         END
     END
     BLOCK "VarFileInfo"
@@ -105,10 +105,10 @@ CAPTION "MzCOM"
 FONT 8, "MS Sans Serif", 0, 0, 0x0
 BEGIN
     DEFPUSHBUTTON   "OK",IDOK,76,69,50,14,BS_CENTER
-    CTEXT           "MzCOM v. 4.1",IDC_STATIC,71,8,61,8
+    CTEXT           "MzCOM v. 4.2",IDC_STATIC,71,8,61,8
     CTEXT           "Copyright (c) 2000-2009 PLT (Paul Steckler)",IDC_STATIC,
                     41,20,146,9
-    CTEXT           "MzScheme v. 4.1",IDC_STATIC,64,35,75,8
+    CTEXT           "MzScheme v. 4.2",IDC_STATIC,64,35,75,8
     CTEXT           "Copyright (c) 1995-2009 PLT Inc.",IDC_STATIC,
                     30,47,143,8
     ICON            MZICON,IDC_STATIC,11,16,20,20
diff --git a/src/worksp/mzcom/mzobj.rgs b/src/worksp/mzcom/mzobj.rgs
index 0ab511ce5d..ef651c82f9 100644
--- a/src/worksp/mzcom/mzobj.rgs
+++ b/src/worksp/mzcom/mzobj.rgs
@@ -1,19 +1,19 @@
 HKCR
 {
-	MzCOM.MzObj.4.1.5.5 = s 'MzObj Class'
+	MzCOM.MzObj.4.2.0.1 = s 'MzObj Class'
 	{
 		CLSID = s '{A3B0AF9E-2AB0-11D4-B6D2-0060089002FE}'
 	}
 	MzCOM.MzObj = s 'MzObj Class'
 	{
 		CLSID = s '{A3B0AF9E-2AB0-11D4-B6D2-0060089002FE}'
-		CurVer = s 'MzCOM.MzObj.4.1.5.5'
+		CurVer = s 'MzCOM.MzObj.4.2.0.1'
 	}
 	NoRemove CLSID
 	{
 		ForceRemove {A3B0AF9E-2AB0-11D4-B6D2-0060089002FE} = s 'MzObj Class'
 		{
-			ProgID = s 'MzCOM.MzObj.4.1.5.5'
+			ProgID = s 'MzCOM.MzObj.4.2.0.1'
 			VersionIndependentProgID = s 'MzCOM.MzObj'
 			ForceRemove 'Programmable'
 			LocalServer32 = s '%MODULE%'
diff --git a/src/worksp/mzscheme/mzscheme.rc b/src/worksp/mzscheme/mzscheme.rc
index e3809b52be..d7558c7765 100644
--- a/src/worksp/mzscheme/mzscheme.rc
+++ b/src/worksp/mzscheme/mzscheme.rc
@@ -29,8 +29,8 @@ APPLICATION             ICON    DISCARDABLE     "mzscheme.ico"
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 4,1,5,5
- PRODUCTVERSION 4,1,5,5
+ FILEVERSION 4,2,0,1
+ PRODUCTVERSION 4,2,0,1
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -48,11 +48,11 @@ BEGIN
             VALUE "CompanyName", "PLT Scheme Inc.\0"
             VALUE "FileDescription", "PLT Scheme application\0"
             VALUE "InternalName", "MzScheme\0"
-            VALUE "FileVersion", "4, 1, 5, 5\0"
+            VALUE "FileVersion", "4, 2, 0, 1\0"
             VALUE "LegalCopyright", "Copyright �© 1995-2009\0"
             VALUE "OriginalFilename", "mzscheme.exe\0"
             VALUE "ProductName", "PLT Scheme\0"
-            VALUE "ProductVersion", "4, 1, 5, 5\0"
+            VALUE "ProductVersion", "4, 2, 0, 1\0"
         END
     END
     BLOCK "VarFileInfo"
diff --git a/src/worksp/starters/start.rc b/src/worksp/starters/start.rc
index cf5a25d62e..2af4c25136 100644
--- a/src/worksp/starters/start.rc
+++ b/src/worksp/starters/start.rc
@@ -22,8 +22,8 @@ APPLICATION             ICON    DISCARDABLE     "mzstart.ico"
 //
 
 VS_VERSION_INFO VERSIONINFO
- FILEVERSION 4,1,5,5
- PRODUCTVERSION 4,1,5,5
+ FILEVERSION 4,2,0,1
+ PRODUCTVERSION 4,2,0,1
  FILEFLAGSMASK 0x3fL
 #ifdef _DEBUG
  FILEFLAGS 0x1L
@@ -45,7 +45,7 @@ BEGIN
 #ifdef MZSTART
             VALUE "FileDescription", "PLT Scheme Launcher\0"
 #endif
-            VALUE "FileVersion", "4, 1, 5, 5\0"
+            VALUE "FileVersion", "4, 2, 0, 1\0"
 #ifdef MRSTART
             VALUE "InternalName", "mrstart\0"
 #endif
@@ -60,7 +60,7 @@ BEGIN
             VALUE "OriginalFilename", "MzStart.exe\0"
 #endif
             VALUE "ProductName", "PLT Scheme\0"
-            VALUE "ProductVersion", "4, 1, 5, 5\0"
+            VALUE "ProductVersion", "4, 2, 0, 1\0"
         END
     END
     BLOCK "VarFileInfo"