diff --git a/CSharp/Engines/WindowsForms/Plugins/UniversalEditor.Plugins.ArkAngles.UserInterface.WindowsForms/UniversalEditor.Plugins.ArkAngles.UserInterface.WindowsForms.csproj b/CSharp/Engines/WindowsForms/Plugins/UniversalEditor.Plugins.ArkAngles.UserInterface.WindowsForms/UniversalEditor.Plugins.ArkAngles.UserInterface.WindowsForms.csproj
index 99fb302b..7517e899 100644
--- a/CSharp/Engines/WindowsForms/Plugins/UniversalEditor.Plugins.ArkAngles.UserInterface.WindowsForms/UniversalEditor.Plugins.ArkAngles.UserInterface.WindowsForms.csproj
+++ b/CSharp/Engines/WindowsForms/Plugins/UniversalEditor.Plugins.ArkAngles.UserInterface.WindowsForms/UniversalEditor.Plugins.ArkAngles.UserInterface.WindowsForms.csproj
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
diff --git a/CSharp/Engines/WindowsForms/Plugins/UniversalEditor.Plugins.Microsoft.SoftwareInstallation.UserInterface.WindowsForms/UniversalEditor.Plugins.Microsoft.Setup.UserInterface.WindowsForms.csproj b/CSharp/Engines/WindowsForms/Plugins/UniversalEditor.Plugins.Microsoft.SoftwareInstallation.UserInterface.WindowsForms/UniversalEditor.Plugins.Microsoft.Setup.UserInterface.WindowsForms.csproj
index 0836206d..7c3cdfad 100644
--- a/CSharp/Engines/WindowsForms/Plugins/UniversalEditor.Plugins.Microsoft.SoftwareInstallation.UserInterface.WindowsForms/UniversalEditor.Plugins.Microsoft.Setup.UserInterface.WindowsForms.csproj
+++ b/CSharp/Engines/WindowsForms/Plugins/UniversalEditor.Plugins.Microsoft.SoftwareInstallation.UserInterface.WindowsForms/UniversalEditor.Plugins.Microsoft.Setup.UserInterface.WindowsForms.csproj
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
diff --git a/CSharp/Engines/WindowsForms/Plugins/UniversalEditor.Plugins.RebelSoftware.UserInterface.WindowsForms/UniversalEditor.Plugins.RebelSoftware.UserInterface.WindowsForms.csproj b/CSharp/Engines/WindowsForms/Plugins/UniversalEditor.Plugins.RebelSoftware.UserInterface.WindowsForms/UniversalEditor.Plugins.RebelSoftware.UserInterface.WindowsForms.csproj
index 3ecbdf33..c36ccc23 100644
--- a/CSharp/Engines/WindowsForms/Plugins/UniversalEditor.Plugins.RebelSoftware.UserInterface.WindowsForms/UniversalEditor.Plugins.RebelSoftware.UserInterface.WindowsForms.csproj
+++ b/CSharp/Engines/WindowsForms/Plugins/UniversalEditor.Plugins.RebelSoftware.UserInterface.WindowsForms/UniversalEditor.Plugins.RebelSoftware.UserInterface.WindowsForms.csproj
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
diff --git a/CSharp/Plugins/UniversalEditor.Plugins.KnowledgeAdventure/UniversalEditor.Plugins.KnowledgeAdventure.csproj b/CSharp/Plugins/UniversalEditor.Plugins.KnowledgeAdventure/UniversalEditor.Plugins.KnowledgeAdventure.csproj
index 0ac9c91a..65f6cc0d 100644
--- a/CSharp/Plugins/UniversalEditor.Plugins.KnowledgeAdventure/UniversalEditor.Plugins.KnowledgeAdventure.csproj
+++ b/CSharp/Plugins/UniversalEditor.Plugins.KnowledgeAdventure/UniversalEditor.Plugins.KnowledgeAdventure.csproj
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
diff --git a/CSharp/Plugins/UniversalEditor.Plugins.Microsoft.Setup/UniversalEditor.Plugins.Microsoft.Setup.csproj b/CSharp/Plugins/UniversalEditor.Plugins.Microsoft.Setup/UniversalEditor.Plugins.Microsoft.Setup.csproj
index a0ba408a..41c735f9 100644
--- a/CSharp/Plugins/UniversalEditor.Plugins.Microsoft.Setup/UniversalEditor.Plugins.Microsoft.Setup.csproj
+++ b/CSharp/Plugins/UniversalEditor.Plugins.Microsoft.Setup/UniversalEditor.Plugins.Microsoft.Setup.csproj
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
diff --git a/CSharp/Plugins/UniversalEditor.Plugins.RebelSoftware/UniversalEditor.Plugins.RebelSoftware.csproj b/CSharp/Plugins/UniversalEditor.Plugins.RebelSoftware/UniversalEditor.Plugins.RebelSoftware.csproj
index 23510c4a..7d0a4b3d 100644
--- a/CSharp/Plugins/UniversalEditor.Plugins.RebelSoftware/UniversalEditor.Plugins.RebelSoftware.csproj
+++ b/CSharp/Plugins/UniversalEditor.Plugins.RebelSoftware/UniversalEditor.Plugins.RebelSoftware.csproj
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+<Project ToolsVersion="4.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
   <PropertyGroup>
     <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>