diff --git a/DocumentViewer.Designer.vb b/DocumentViewer.Designer.vb
index 59ad094..b93f23c 100644
--- a/DocumentViewer.Designer.vb
+++ b/DocumentViewer.Designer.vb
@@ -389,7 +389,7 @@ Partial Class DocumentViewer
         Me.MyGDPViewer.MagnifierZoomY = 2.0!
         Me.MyGDPViewer.MouseButtonForMouseMode = GdPicture14.MouseButton.MouseButtonLeft
         Me.MyGDPViewer.MouseMode = GdPicture14.ViewerMouseMode.MouseModePan
-        Me.MyGDPViewer.MouseWheelMode = GdPicture14.ViewerMouseWheelMode.MouseWheelModeZoom
+        Me.MyGDPViewer.MouseWheelMode = GdPicture14.ViewerMouseWheelMode.MouseWheelModeVerticalScroll
         Me.MyGDPViewer.Name = "MyGDPViewer"
         Me.MyGDPViewer.PageBordersColor = System.Drawing.Color.Black
         Me.MyGDPViewer.PageBordersPenSize = 1
diff --git a/DocumentViewer.vb b/DocumentViewer.vb
index 645dbea..e1e63a7 100644
--- a/DocumentViewer.vb
+++ b/DocumentViewer.vb
@@ -732,7 +732,6 @@ Public Class DocumentViewer
             End If
 
             ShowGdViewer()
-            MyGDPViewer.MouseWheelMode = ViewerMouseWheelMode.MouseWheelModeVerticalScroll
             _ViewerMode = ViewerMode.GDPicture
             _ViewOverride = ""
             Return True
@@ -793,6 +792,7 @@ Public Class DocumentViewer
         If MyGDPViewer IsNot Nothing Then
             MyGDPViewer.Dock = DockStyle.Fill
             MyGDPViewer.Visible = True
+            MyGDPViewer.MouseWheelMode = ViewerMouseWheelMode.MouseWheelModeVerticalScroll
             FitToWidth()
         End If
     End Sub
diff --git a/DocumentViewer.vbproj b/DocumentViewer.vbproj
index 0b7d5e9..7bfe3f7 100644
--- a/DocumentViewer.vbproj
+++ b/DocumentViewer.vbproj
@@ -212,6 +212,9 @@
       <HintPath>packages\Microsoft.Bcl.AsyncInterfaces.8.0.0\lib\net462\Microsoft.Bcl.AsyncInterfaces.dll</HintPath>
     </Reference>
     <Reference Include="Microsoft.CSharp" />
+    <Reference Include="Microsoft.Win32.Registry, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>packages\Microsoft.Win32.Registry.5.0.0\lib\net461\Microsoft.Win32.Registry.dll</HintPath>
+    </Reference>
     <Reference Include="Newtonsoft.Json, Version=13.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed, processorArchitecture=MSIL">
       <HintPath>packages\Newtonsoft.Json.13.0.3\lib\net45\Newtonsoft.Json.dll</HintPath>
     </Reference>
@@ -269,9 +272,15 @@
     </Reference>
     <Reference Include="System.Runtime.Serialization" />
     <Reference Include="System.Security" />
+    <Reference Include="System.Security.AccessControl, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>packages\System.Security.AccessControl.5.0.0\lib\net461\System.Security.AccessControl.dll</HintPath>
+    </Reference>
     <Reference Include="System.Security.Cryptography.Pkcs, Version=8.0.0.1, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
       <HintPath>packages\System.Security.Cryptography.Pkcs.8.0.1\lib\net462\System.Security.Cryptography.Pkcs.dll</HintPath>
     </Reference>
+    <Reference Include="System.Security.Principal.Windows, Version=5.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
+      <HintPath>packages\System.Security.Principal.Windows.5.0.0\lib\net461\System.Security.Principal.Windows.dll</HintPath>
+    </Reference>
     <Reference Include="System.ServiceModel" />
     <Reference Include="System.Text.Encodings.Web, Version=8.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
       <HintPath>packages\System.Text.Encodings.Web.8.0.0\lib\net462\System.Text.Encodings.Web.dll</HintPath>
diff --git a/My Project/AssemblyInfo.vb b/My Project/AssemblyInfo.vb
index 69030dd..b434c0c 100644
--- a/My Project/AssemblyInfo.vb	
+++ b/My Project/AssemblyInfo.vb	
@@ -31,5 +31,5 @@ Imports System.Runtime.InteropServices
 ' übernehmen, indem Sie "*" eingeben:
 ' <Assembly: AssemblyVersion("1.0.*")>
 
-<Assembly: AssemblyVersion("2.7.0.0")>
-<Assembly: AssemblyFileVersion("2.7.0.0")>
+<Assembly: AssemblyVersion("2.7.1.0")>
+<Assembly: AssemblyFileVersion("2.7.1.0")>
diff --git a/packages.config b/packages.config
index 18dc42d..afc492f 100644
--- a/packages.config
+++ b/packages.config
@@ -9,6 +9,7 @@
   <package id="Microsoft.Bcl.AsyncInterfaces" version="8.0.0" targetFramework="net462" />
   <package id="Microsoft.CSharp" version="4.7.0" targetFramework="net462" />
   <package id="Microsoft.VisualBasic" version="10.3.0" targetFramework="net462" />
+  <package id="Microsoft.Win32.Registry" version="5.0.0" targetFramework="net462" />
   <package id="Newtonsoft.Json" version="13.0.3" targetFramework="net462" />
   <package id="Newtonsoft.Json.Bson" version="1.0.2" targetFramework="net462" />
   <package id="NLog" version="5.0.5" targetFramework="net461" />
@@ -24,7 +25,9 @@
   <package id="System.Memory" version="4.6.0" targetFramework="net462" />
   <package id="System.Numerics.Vectors" version="4.6.0" targetFramework="net462" />
   <package id="System.Runtime.CompilerServices.Unsafe" version="6.1.0" targetFramework="net462" />
+  <package id="System.Security.AccessControl" version="5.0.0" targetFramework="net462" />
   <package id="System.Security.Cryptography.Pkcs" version="8.0.1" targetFramework="net462" />
+  <package id="System.Security.Principal.Windows" version="5.0.0" targetFramework="net462" />
   <package id="System.Text.Encodings.Web" version="8.0.0" targetFramework="net462" />
   <package id="System.Text.Json" version="8.0.6" targetFramework="net462" />
   <package id="System.Threading.Tasks.Extensions" version="4.5.4" targetFramework="net462" />