diff --git a/Directory.Build.props b/Directory.Build.props
index bcc8f877e669d67305176196895503651e1eaddb..4d7c280337741b9ee347add629c7ab79ed6304e0 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -2,13 +2,13 @@
   <PropertyGroup>
      
     <!-- For a Release-Candidate uncomment the following line: -->
-     <DefineConstants>RELEASE_CANDIDATE</DefineConstants> 
+    <!--<DefineConstants>RELEASE_CANDIDATE</DefineConstants>--> 
 
     <!-- For a Release uncomment the following line: -->
-    <!--<DefineConstants>CERTIFICATION_RELEASE</DefineConstants>-->
+    <DefineConstants>CERTIFICATION_RELEASE</DefineConstants>
 
     <!-- Global VECTO Version -->
-    <MainProductVersion>4.1.0</MainProductVersion>
+    <MainProductVersion>4.1.1</MainProductVersion>
     <!-- <VersionSuffix>RC</VersionSuffix> -->
 
     <!-- The following settings are used as default values for ALL projects -->
diff --git a/Documentation/User Manual Source/Release Notes Vecto4.x.pptx b/Documentation/User Manual Source/Release Notes Vecto4.x.pptx
index d552013c074beb31a79c430b27e61ac6eb97f802..8935884bddf8c5cf505162229d396965925b7dc8 100644
Binary files a/Documentation/User Manual Source/Release Notes Vecto4.x.pptx and b/Documentation/User Manual Source/Release Notes Vecto4.x.pptx differ
diff --git a/Documentation/User Manual Source/release notes vecto4.x.pdf b/Documentation/User Manual Source/release notes vecto4.x.pdf
index 2cf3766656a72f534804e6fd16c5c0ea1cb5c694..cdb02f5c409ab319600539e7f43a69eefbafa5b8 100644
Binary files a/Documentation/User Manual Source/release notes vecto4.x.pdf and b/Documentation/User Manual Source/release notes vecto4.x.pdf differ
diff --git a/Documentation/User Manual/6-changelog/changelog.md b/Documentation/User Manual/6-changelog/changelog.md
index 0b98d8a090c84d2bd1d9a2ee7193f5f87852e1fd..b36c1b1c5a2fc3f6ea07b96e815f127dbeb76334 100644
--- a/Documentation/User Manual/6-changelog/changelog.md	
+++ b/Documentation/User Manual/6-changelog/changelog.md	
@@ -1,5 +1,16 @@
 # Changelog
 
+**VECTO-4.1.1**
+
+***Build 3413 (2024-05-06)***
+
+- Bugfixes
+   * CodeEU-615: Multistep freezes after loading VIF chassis
+   * CodeEU-616: Multistep tool freezes
+   * CodeEU-619: restore wrong exempted techs in XSD for backwards compatibility
+   * CodeEU-617: Results change depending the time format
+   * CodeEU-635: Revert multiple summary in CIF
+
 **VECTO-4.1.0-RC**
 
 ***Build 3392 (2024-04-15)***
diff --git a/Documentation/User Manual/help.html b/Documentation/User Manual/help.html
index f21b9d84af4bcaaacb0bd8a806a34a24792d0bf1..94fee0c317bd4b2ce4dab38e335e3738eb1091da 100644
--- a/Documentation/User Manual/help.html	
+++ b/Documentation/User Manual/help.html	
@@ -10928,6 +10928,19 @@ stored as LOG_backup.txt.</p>
 </section>
 <section id="changelog" class="level1">
 <h1>Changelog</h1>
+<p><strong>VECTO-4.1.1</strong></p>
+<p><strong><em>Build 3413 (2024-05-06)</em></strong></p>
+<ul>
+<li>Bugfixes
+<ul>
+<li>CodeEU-615: Multistep freezes after loading VIF chassis</li>
+<li>CodeEU-616: Multistep tool freezes</li>
+<li>CodeEU-619: restore wrong exempted techs in XSD for backwards
+compatibility</li>
+<li>CodeEU-617: Results change depending the time format</li>
+<li>CodeEU-635: Revert multiple summary in CIF</li>
+</ul></li>
+</ul>
 <p><strong>VECTO-4.1.0-RC</strong></p>
 <p><strong><em>Build 3392 (2024-04-15)</em></strong></p>
 <ul>