diff --git a/Configuration/GlobalAssemblyInfo.cs b/Configuration/GlobalAssemblyInfo.cs
index 04ecf884b..20e8a1ba2 100644
--- a/Configuration/GlobalAssemblyInfo.cs
+++ b/Configuration/GlobalAssemblyInfo.cs
@@ -15,7 +15,7 @@ internal static class RevisionClass
 	public const string Major = "3";
 	public const string Minor = "3";
 	public const string Build = "0";
-	public const string Revision = "1549";
+	public const string Revision = "1551";
 
         public const string MainVersion = Major + "." + Minor;
 	public const string FullVersion = Major + "." + Minor + "." + Build + "." + Revision;
diff --git a/Configuration/Version.defs b/Configuration/Version.defs
index 96c669995..2995444e8 100644
--- a/Configuration/Version.defs
+++ b/Configuration/Version.defs
@@ -1,4 +1,4 @@
 %COREVERSION%=0
-%REVISION%=1549
+%REVISION%=1551
 %MINOR%=3
 %MAJOR%=3
diff --git a/ReleaseGenerators/PascalABCNET_head.nsh b/ReleaseGenerators/PascalABCNET_head.nsh
index 9c9760f3e..aab7bb228 100644
--- a/ReleaseGenerators/PascalABCNET_head.nsh
+++ b/ReleaseGenerators/PascalABCNET_head.nsh
@@ -112,6 +112,7 @@ Section
 	${AddDirectory} "$INSTDIR\Highlighting"
 	${AddDirectory} "$INSTDIR\PT4"
 	${AddDirectory} "$INSTDIR\Ico"
+	${AddDirectory} "$INSTDIR\Doc"
 	${AddInstallerFile} "Uninstall.exe"
 SectionEnd
 
diff --git a/ReleaseGenerators/PascalABCNET_version.nsh b/ReleaseGenerators/PascalABCNET_version.nsh
index 51e9a3dc0..ad29f1d5b 100644
--- a/ReleaseGenerators/PascalABCNET_version.nsh
+++ b/ReleaseGenerators/PascalABCNET_version.nsh
@@ -1 +1 @@
-!define VERSION '3.3.0.1549'
+!define VERSION '3.3.0.1551'
diff --git a/ReleaseGenerators/sect_Core.nsh b/ReleaseGenerators/sect_Core.nsh
index a5e2396f7..6dba115b9 100644
--- a/ReleaseGenerators/sect_Core.nsh
+++ b/ReleaseGenerators/sect_Core.nsh
@@ -81,7 +81,6 @@
     File ..\bin\Lib\FormsABC.pcu
     File ..\bin\Lib\GraphABC.pcu
     File ..\bin\Lib\NumLibABC.pcu
-    File ..\bin\Lib\NumLibABC.pdf
     File ..\bin\Lib\GraphWPF.pcu
     File ..\bin\Lib\Graph3D.pcu
     File ..\bin\Lib\GraphABCHelper.pcu
@@ -134,7 +133,6 @@
     ${AddFile} "GOLDParserEngine.pcu"
     ${AddFile} "GraphABC.pcu"
     ${AddFile} "NumLibABC.pcu"
-    ${AddFile} "NumLibABC.pdf"
     ${AddFile} "GraphWPF.pcu"
     ${AddFile} "Graph3D.pcu"
     ${AddFile} "GraphABCHelper.pcu"
@@ -165,6 +163,12 @@
     ${AddFile} "PABCRtl.dll"
     ${AddFile} "HelixToolkit.Wpf.dll"
     ${AddFile} "PABCRtl.pdb"
+
+    SetOutPath "$INSTDIR\Doc"
+    File ..\Doc\NumLibABC.pdf
+    ${AddFile} "NumLibABC.pdf"
+
+
     Push "Lib\PABCRtl.dll"
     Call NGEN
     Push "Lib\HelixToolkit.Wpf.dll"
diff --git a/bin/Lib/NumLibABC.pdf b/bin/Lib/NumLibABC.pdf
deleted file mode 100644
index 649a3b640..000000000
Binary files a/bin/Lib/NumLibABC.pdf and /dev/null differ
diff --git a/bin/PascalABCNET.chm b/bin/PascalABCNET.chm
index 2d41b1323..9a8cca7e9 100644
Binary files a/bin/PascalABCNET.chm and b/bin/PascalABCNET.chm differ