diff --git a/org.lamport.tla.toolbox.doc/META-INF/MANIFEST.MF b/org.lamport.tla.toolbox.doc/META-INF/MANIFEST.MF
index 8bfc83d2f6abbdd5bd55ad83d5126c6e81bbc537..89939ce998431311287a8062fc35a66a44add039 100644
--- a/org.lamport.tla.toolbox.doc/META-INF/MANIFEST.MF
+++ b/org.lamport.tla.toolbox.doc/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@ Manifest-Version: 1.0
 Bundle-ManifestVersion: 2
 Bundle-Name: TLA+ Toolbox Help
 Bundle-SymbolicName: org.lamport.tla.toolbox.doc; singleton:=true
-Bundle-Version: 1.5.0.qualifier
+Bundle-Version: 1.5.1.qualifier
 Bundle-RequiredExecutionEnvironment: J2SE-1.4
 Bundle-Vendor: Simon Zambrovski, Leslie Lamport
 Bundle-ActivationPolicy: lazy
diff --git a/org.lamport.tla.toolbox.doc/pom.xml b/org.lamport.tla.toolbox.doc/pom.xml
index d31cecdde6832ee897dc667a2d135e132681eb74..00918419ce09ee13dfb9f5327201262aeaf9347a 100644
--- a/org.lamport.tla.toolbox.doc/pom.xml
+++ b/org.lamport.tla.toolbox.doc/pom.xml
@@ -11,6 +11,6 @@
   </parent>
   <groupId>tlatoolbox</groupId>
   <artifactId>org.lamport.tla.toolbox.doc</artifactId>
-  <version>1.5.0-SNAPSHOT</version>
+  <version>1.5.1-SNAPSHOT</version>
   <packaging>eclipse-plugin</packaging>
 </project>
diff --git a/org.lamport.tla.toolbox.product.product/org.lamport.tla.toolbox.product.product.product b/org.lamport.tla.toolbox.product.product/org.lamport.tla.toolbox.product.product.product
index bc3001bf8d46044e2887f03faba5d82ac6020f2c..eb9fc20ee5a84937c71dc3efa2d537b9d2fbba00 100644
--- a/org.lamport.tla.toolbox.product.product/org.lamport.tla.toolbox.product.product.product
+++ b/org.lamport.tla.toolbox.product.product/org.lamport.tla.toolbox.product.product.product
@@ -1,16 +1,16 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <?pde version="3.5"?>
 
-<product name="TLA+ Toolbox" uid="org.lamport.tla.toolbox.product.product" id="org.lamport.tla.toolbox.product.standalone.product" application="org.lamport.tla.toolbox.application" version="1.5.0" useFeatures="true" includeLaunchers="true">
+<product name="TLA+ Toolbox" uid="org.lamport.tla.toolbox.product.product" id="org.lamport.tla.toolbox.product.standalone.product" application="org.lamport.tla.toolbox.application" version="1.5.1" useFeatures="true" includeLaunchers="true">
 
    <aboutInfo>
       <image path="/org.lamport.tla.toolbox.product.standalone/images/splash_small.png"/>
       <text>
          TLA+ Toolbox provides a user interface for TLA+ Tools. 
 
-This is Version 1.5.0 of 11 May 2015 and includes:
+This is Version 1.5.1 of UNRELEASED and includes:
   - SANY Version 2.1 of 24 February 2014
-  - TLC Version 2.06 of 9 May 2015
+  - TLC Version 2.07 of UNRELEASED
   - PlusCal Version 1.8 of 2 April 2013
   - TLATeX Version 1.0 of 12 April 2013
 
@@ -69,7 +69,7 @@ Please send us reports of problems or suggestions; see https://groups.google.com
       <plugin id="org.eclipse.equinox.http.registry" autoStart="true" startLevel="3" />
       <plugin id="org.lamport.tla.toolbox.jclouds" autoStart="true" startLevel="4" />
       <plugin id="sts" autoStart="true" startLevel="4" />
-      <property name="eclipse.buildId" value="1.5.0" />
+      <property name="eclipse.buildId" value="1.5.1" />
    </configurations>
 
    <repositories>
diff --git a/org.lamport.tla.toolbox.product.product/pom.xml b/org.lamport.tla.toolbox.product.product/pom.xml
index c1a8e757555c069c84976a22794c476613e29baf..ee6c51827a2bda72ad3e7d4a6596920232dbac96 100644
--- a/org.lamport.tla.toolbox.product.product/pom.xml
+++ b/org.lamport.tla.toolbox.product.product/pom.xml
@@ -75,7 +75,7 @@
                    over features. The version segment has to be manually increment
                    upon a release.  
                    see https://bugs.eclipse.org/bugs/show_bug.cgi?id=357503#c22 -->
-              <archiveFileName>TLAToolbox-1.5.0</archiveFileName>
+              <archiveFileName>TLAToolbox-1.5.1</archiveFileName>
               <rootFolder>toolbox</rootFolder>
             </product>
           </products>
diff --git a/org.lamport.tla.toolbox.product.standalone/plugin.xml b/org.lamport.tla.toolbox.product.standalone/plugin.xml
index 5a54abdfd343c8244f91d86eca811fab8083849c..2834b8f619306a6f525b7629c3bf9bb50a30fa14 100644
--- a/org.lamport.tla.toolbox.product.standalone/plugin.xml
+++ b/org.lamport.tla.toolbox.product.standalone/plugin.xml
@@ -29,7 +29,7 @@
          </property>
          <property
                name="aboutText"
-               value="TLA+ Toolbox provides a user interface for TLA+ Tools. &#x0A;&#x0A;This is Version 1.5.0 of 11 May 2015 and includes:&#x0A;  - SANY Version 2.1 of 24 February 2014&#x0A;  - TLC Version 2.06 of 9 May 2015&#x0A;  - PlusCal Version 1.8 of 2 April 2013&#x0A;  - TLATeX Version 1.0 of 12 April 2013&#x0A;&#x0A;Don&apos;t forget to click on help.  You can learn about features that you never knew about or have forgotten.&#x0A;&#x0A;Please send us reports of problems or suggestions; see https://groups.google.com/d/forum/tlaplus .">
+               value="TLA+ Toolbox provides a user interface for TLA+ Tools. &#x0A;&#x0A;This is Version 1.5.1 of UNRELEASED and includes:&#x0A;  - SANY Version 2.1 of 24 February 2014&#x0A;  - TLC Version 2.07 of UNRELEASED&#x0A;  - PlusCal Version 1.8 of 2 April 2013&#x0A;  - TLATeX Version 1.0 of 12 April 2013&#x0A;&#x0A;Don&apos;t forget to click on help.  You can learn about features that you never knew about or have forgotten.&#x0A;&#x0A;Please send us reports of problems or suggestions; see https://groups.google.com/d/forum/tlaplus .">
          </property>
          <property
                name="aboutImage"
diff --git a/org.lamport.tla.toolbox/src/org/lamport/tla/toolbox/ui/view/ToolboxWelcomeView.java b/org.lamport.tla.toolbox/src/org/lamport/tla/toolbox/ui/view/ToolboxWelcomeView.java
index c79137f07e88ed6ad402b0ecd8b46730966cc2f0..277fbeca3ba0a5f4fb9ac97b30072ee0b4739a71 100644
--- a/org.lamport.tla.toolbox/src/org/lamport/tla/toolbox/ui/view/ToolboxWelcomeView.java
+++ b/org.lamport.tla.toolbox/src/org/lamport/tla/toolbox/ui/view/ToolboxWelcomeView.java
@@ -201,7 +201,7 @@ public class ToolboxWelcomeView extends ViewPart
 		
 		final Label lblVersion = new Label(outerContainer, SWT.WRAP);
 		lblVersion.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, false, false, 2, 1));
-		lblVersion.setText("Version 1.5.0  of 11 May 2015");
+		lblVersion.setText("Version 1.5.1  of UNRELEASED");
 		lblVersion.setBackground(backgroundColor);
     }