diff --git a/MainWindow.axaml b/MainWindow.axaml
index 47003a1..28371f3 100644
--- a/MainWindow.axaml
+++ b/MainWindow.axaml
@@ -3,7 +3,7 @@
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-        x:Class="Logof_Client.MainWindow"
+        x:Class="Logof_Client.MainWindow" WindowState="Maximized"
         Title="Logof Client">
     <Border>
         <Grid RowDefinitions="30,*">
@@ -20,30 +20,88 @@
                 </MenuItem>
             </Menu>
             <TabControl Grid.Row="1">
-                <TabItem Header="Adressverwaltung">
+                <TabItem>
+                    <TabItem.Header>
+                        <StackPanel Orientation="Horizontal">
+                            <LucideIcon Kind="MapPinHouse" Width="32" Height="32" Size="32" />
+                            <Label FontSize="20" Content="Addressverwaltung" VerticalContentAlignment="Center" />
+                        </StackPanel>
+                    </TabItem.Header>
                     <Grid RowDefinitions="*,*">
-                        <Grid Grid.Row="0">
-                            <StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center">
-                                <TextBox x:Name="TbFilename" Watermark="Dateipfad" Width="400" VerticalContentAlignment="Center" />
-                                <Button x:Name="BtnChooseFile" Margin="10,0,0,0" Click="BtnChooseFile_OnClick">
+                        <Grid ColumnDefinitions="*,*" Grid.Row="0">
+                            <!-- Kunden -->
+                            <Grid Margin="30,30,10,30">
+                                <Grid.RowDefinitions>
+                                    <RowDefinition Height="Auto" />
+                                    <RowDefinition Height="*" />
+                                </Grid.RowDefinitions>
+
+                                <StackPanel Orientation="Horizontal" Grid.Row="0">
+                                    <LucideIcon Kind="CircleUser" Width="16" Height="16" Size="16" />
+                                    <Label Content="Kunden" VerticalContentAlignment="Center" />
+                                </StackPanel>
+
+                                <ListBox Grid.Row="1"
+                                         Margin="0,5,0,0"
+                                         x:Name="LstCustomers"
+                                         Background="AliceBlue"
+                                         SelectionMode="Single" />
+                            </Grid>
+
+                            <!-- Address-Sets -->
+                            <Grid Margin="10,30,30,30" Grid.Column="1">
+                                <Grid.RowDefinitions>
+                                    <RowDefinition Height="Auto" />
+                                    <RowDefinition Height="*" />
+                                    <RowDefinition Height="Auto" />
+                                </Grid.RowDefinitions>
+
+                                <StackPanel Orientation="Horizontal" Grid.Row="0">
+                                    <LucideIcon Kind="NotebookTabs" Width="16" Height="16" Size="16" />
+                                    <Label Content="Address-Sets" VerticalContentAlignment="Center" />
+                                </StackPanel>
+
+                                <ListBox Grid.Row="1"
+                                         x:Name="LstCustomerAdressSets"
+                                         Background="AliceBlue"
+                                         Margin="0,5,0,5"
+                                         SelectionMode="Multiple,Toggle" />
+
+                                <Button Grid.Row="2" HorizontalAlignment="Stretch">
                                     <StackPanel Orientation="Horizontal">
-                                        <LucideIcon Kind="FolderOpen" Width="16" Height="16" Size="16" />
-                                        <Label Content="Öffnen" VerticalContentAlignment="Center" />
+                                        <LucideIcon Kind="Plus" Width="16" Height="16" Size="16" />
+                                        <Label Content="Importieren" VerticalContentAlignment="Center" />
                                     </StackPanel>
                                 </Button>
-                            </StackPanel>
+                            </Grid>
                         </Grid>
+                        <!-- <Grid Grid.Row="0"> -->
+                        <!--     <StackPanel Orientation="Horizontal" VerticalAlignment="Center" -->
+                        <!--                 HorizontalAlignment="Center"> -->
+                        <!--         <TextBox x:Name="TbFilename" Watermark="Dateipfad" Width="400" -->
+                        <!--                  VerticalContentAlignment="Center" /> -->
+                        <!--         <Button x:Name="BtnChooseFile" Margin="10,0,0,0" Click="BtnChooseFile_OnClick"> -->
+                        <!--             <StackPanel Orientation="Horizontal"> -->
+                        <!--                 <LucideIcon Kind="FolderOpen" Width="16" Height="16" Size="16" /> -->
+                        <!--                 <Label Content="Öffnen" VerticalContentAlignment="Center" /> -->
+                        <!--             </StackPanel> -->
+                        <!--         </Button> -->
+                        <!--     </StackPanel> -->
+                        <!-- </Grid> -->
                         <Grid Grid.ColumnDefinitions="*,*" Grid.Row="1">
                             <StackPanel Grid.Column="0" Width="250" Orientation="Vertical" HorizontalAlignment="Right"
                                         Margin="0,0,5,0">
-                                <Button HorizontalAlignment="Stretch" HorizontalContentAlignment="Center" Margin="0,0,0,10"
+                                <Button HorizontalAlignment="Stretch" HorizontalContentAlignment="Center"
+                                        Margin="0,0,0,10"
                                         x:Name="BtnCheck" Click="BtnCheck_OnClick">
                                     <StackPanel Orientation="Horizontal">
                                         <LucideIcon Kind="SpellCheck" Width="36" Height="36" />
-                                        <Label Content="Prüfen" VerticalContentAlignment="Center" FontSize="15" FontWeight="Bold" />
+                                        <Label Content="Prüfen" VerticalContentAlignment="Center" FontSize="15"
+                                               FontWeight="Bold" />
                                     </StackPanel>
                                 </Button>
-                                <Button HorizontalAlignment="Stretch" IsEnabled="True" HorizontalContentAlignment="Center"
+                                <Button HorizontalAlignment="Stretch" IsEnabled="True"
+                                        HorizontalContentAlignment="Center"
                                         Click="BtnCombine_OnClick" x:Name="BtnCombine"
                                         Margin="0,0,0,10">
                                     <StackPanel Orientation="Horizontal">
@@ -52,7 +110,8 @@
                                                FontWeight="Bold" />
                                     </StackPanel>
                                 </Button>
-                                <Button HorizontalAlignment="Stretch" IsEnabled="False" HorizontalContentAlignment="Center"
+                                <Button HorizontalAlignment="Stretch" IsEnabled="False"
+                                        HorizontalContentAlignment="Center"
                                         Margin="0,0,0,10">
                                     <StackPanel Orientation="Horizontal">
                                         <LucideIcon Kind="Hammer" Width="36" Height="36" />
@@ -63,18 +122,22 @@
                             </StackPanel>
                             <StackPanel Grid.Column="1" Width="250" Orientation="Vertical" HorizontalAlignment="Left"
                                         Margin="5,0,0,0">
-                                <Button HorizontalAlignment="Stretch" IsEnabled="False" HorizontalContentAlignment="Center"
+                                <Button HorizontalAlignment="Stretch" IsEnabled="False"
+                                        HorizontalContentAlignment="Center"
                                         Margin="0,0,0,10">
                                     <StackPanel Orientation="Horizontal">
                                         <LucideIcon Kind="ListX" Width="36" Height="36" />
-                                        <Label Content="Kürzen" VerticalContentAlignment="Center" FontSize="15" FontWeight="Bold" />
+                                        <Label Content="Kürzen" VerticalContentAlignment="Center" FontSize="15"
+                                               FontWeight="Bold" />
                                     </StackPanel>
                                 </Button>
-                                <Button HorizontalAlignment="Stretch" IsEnabled="False" HorizontalContentAlignment="Center"
+                                <Button HorizontalAlignment="Stretch" IsEnabled="False"
+                                        HorizontalContentAlignment="Center"
                                         Margin="0,0,0,10">
                                     <StackPanel Orientation="Horizontal">
                                         <LucideIcon Kind="Tags" Width="36" Height="36" />
-                                        <Label Content="Etiketten generieren" VerticalContentAlignment="Center" FontSize="15"
+                                        <Label Content="Etiketten generieren" VerticalContentAlignment="Center"
+                                               FontSize="15"
                                                FontWeight="Bold" />
                                     </StackPanel>
                                 </Button>
@@ -82,12 +145,75 @@
                         </Grid>
                     </Grid>
                 </TabItem>
-                <TabItem Header="Personalverwaltung" IsEnabled="False"></TabItem>
-                <TabItem Header="Finanzverwaltung" IsEnabled="False"></TabItem>
-                <TabItem Header="Preisverwaltung" IsEnabled="False"></TabItem>
-                <TabItem Header="Einstellungen" IsEnabled="False"></TabItem>
+                <TabItem IsEnabled="False">
+                    <TabItem.Header>
+                        <StackPanel Orientation="Horizontal">
+                            <LucideIcon Kind="Users" Width="32" Height="32" Size="32" />
+                            <Label FontSize="20" Content="Personalverwaltung" VerticalContentAlignment="Center" />
+                        </StackPanel>
+                    </TabItem.Header>
+                </TabItem>
+                <TabItem IsEnabled="False">
+                    <TabItem.Header>
+                        <StackPanel Orientation="Horizontal">
+                            <LucideIcon Kind="BadgeEuro" Width="32" Height="32" Size="32" />
+                            <Label FontSize="20" Content="Finanzverwaltung" VerticalContentAlignment="Center" />
+                        </StackPanel>
+                    </TabItem.Header>
+                </TabItem>
+                <TabItem IsEnabled="False">
+                    <TabItem.Header>
+                        <StackPanel Orientation="Horizontal">
+                            <LucideIcon Kind="ReceiptEuro" Width="32" Height="32" Size="32" />
+                            <Label FontSize="20" Content="Preisverwaltung" VerticalContentAlignment="Center" />
+                        </StackPanel>
+                    </TabItem.Header>
+                </TabItem>
+                <TabItem IsEnabled="True">
+                    <TabItem.Header>
+                        <StackPanel Orientation="Horizontal">
+                            <LucideIcon Kind="Settings" Width="32" Height="32" Size="32" />
+                            <Label FontSize="20" Content="Einstellungen" VerticalContentAlignment="Center" />
+                        </StackPanel>
+                    </TabItem.Header>
+                    <TabControl>
+                        <TabItem>
+                            <TabItem.Header>
+                                <StackPanel Orientation="Horizontal">
+                                    <LucideIcon Kind="FileCog" Width="16" Height="16" Size="16" />
+                                    <Label FontSize="16" Content="Global" VerticalContentAlignment="Center" />
+                                </StackPanel>
+                            </TabItem.Header>
+                            <StackPanel Orientation="Vertical">
+                                <Grid ColumnDefinitions="400,*">
+                                    <Label Grid.Column="0">config-Datei</Label>
+                                    <StackPanel Grid.Column="1" Orientation="Horizontal">
+                                        <TextBox x:Name="TbConfigPath" HorizontalAlignment="Stretch"
+                                                 Watermark="/home/username/.config/logofclient/config.json" />
+                                        <Button>
+                                            <Button.Content>
+                                                <StackPanel Orientation="Horizontal">
+                                                    <LucideIcon Kind="File" Width="16" Height="16" Size="16" />
+                                                    <Label Content="Öffnen..." VerticalContentAlignment="Center" />
+                                                </StackPanel>
+                                            </Button.Content>
+                                        </Button>
+                                    </StackPanel>
+                                </Grid>
+                            </StackPanel>
+                        </TabItem>
+                        <TabItem>
+                            <TabItem.Header>
+                                <StackPanel Orientation="Horizontal">
+                                    <LucideIcon Kind="Contact" Width="16" Height="16" Size="16" />
+                                    <Label FontSize="16" Content="Kunden" VerticalContentAlignment="Center" />
+                                </StackPanel>
+                            </TabItem.Header>
+                        </TabItem>
+                    </TabControl>
+                </TabItem>
             </TabControl>
         </Grid>
-        
+
     </Border>
 </Window>
\ No newline at end of file
diff --git a/MainWindow.axaml.cs b/MainWindow.axaml.cs
index e4069a9..293ee9e 100644
--- a/MainWindow.axaml.cs
+++ b/MainWindow.axaml.cs
@@ -17,24 +17,7 @@ public partial class MainWindow : Window
     {
         InitializeComponent();
         _instance = this;
-        // try
-        // {
-        //     var temppath = "kaspersons.csv";
-        //     var result = DataImport.ImportKasAddressList(new Uri(temppath));
-        //     if (result.Item1)
-        //     {
-        //         var check_result = new AddressCheck().Perform(result.Item2);
-        //         foreach (var item in check_result.Result)
-        //         {
-        //             Console.WriteLine();
-        //             Console.Write(item.Item1 + " ");
-        //             foreach (var error in item.Item2) Console.Write(error + ", ");
-        //         }
-        //     }
-        // }
-        // catch
-        // {
-        // }
+        WindowState = WindowState.Maximized;
     }
 
     private async void StartAddressCheck(Uri path)
@@ -42,20 +25,37 @@ public partial class MainWindow : Window
         var addresses = DataImport.ImportKasAddressList(path); // Ihr Code hier
         var progressWindow = new ProgressWindow();
 
-        // Fenster anzeigen (nicht blockierend)
         progressWindow.Show(_instance);
 
         var processor = new AddressCheck(progressWindow);
         var result = await processor.Perform(addresses.Item2);
 
-        // Nach Verarbeitung schließen
+
         progressWindow.Close();
 
-        // Ergebnis anzeigen, z.B. als Dialog
+
         new ResultWindow(result, addresses.Item2).Show();
         //await MessageBox.Show(_instance, $"{result.Count} Einträge fehlerhaft.", "Fertig");
     }
 
+    private async void StartAddressRepair(Uri path)
+    {
+        var addresses = DataImport.ImportKasAddressList(path); // Ihr Code hier
+        var progressWindow = new ProgressWindow();
+
+        progressWindow.Show(_instance);
+
+        var processor = new AddressRepair(progressWindow);
+        //var result = await processor.Perform(addresses.Item2, errors);
+
+
+        progressWindow.Close();
+
+
+        //new ResultWindow(result, addresses.Item2).Show();
+        //await MessageBox.Show(_instance, $"{result.Count} Einträge fehlerhaft.", "Fertig");
+    }
+
     private void MnuExit_OnClick(object? sender, RoutedEventArgs e)
     {
         Environment.Exit(0);
@@ -99,7 +99,7 @@ public partial class MainWindow : Window
         });
 
         if (file == null) return;
-        TbFilename.Text = file[0].Path.ToString();
+        //TbFilename.Text = file[0].Path.ToString();
         filePath = file[0].Path;
     }