FModel/FModel/Forms/FModel_UpdateMode.xaml

<Window x:Class="FModel.Forms.FModel_UpdateMode"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:FModel.Forms"
        mc:Ignorable="d"
        Title="Update Mode" Height="315" Width="700" UseLayoutRounding="True"
        Style="{StaticResource {x:Type Window}}" WindowStartupLocation="CenterScreen" Icon="/FModel;component/Logo.ico" ResizeMode="CanMinimize" Loaded="Window_Loaded">
    <Grid>
        <ListBox x:Name="AssetsListBox" HorizontalAlignment="Left" Height="225" Margin="10,10,0,0" VerticalAlignment="Top" Width="250" ItemsSource="{Binding Assets}" SelectionChanged="AssetsListBox_SelectionChanged">
            <ListBox.ItemTemplate>
                <DataTemplate>
                    <CheckBox Content="{Binding Name}" IsChecked="{Binding IsChecked}"/>
                </DataTemplate>
            </ListBox.ItemTemplate>
            <ListBox.ContextMenu>
                <ContextMenu>
                    <MenuItem x:Name="RC_Properties" Header="Properties" Click="RC_Properties_Click">
                        <MenuItem.Icon>
                            <Image Width="16" Height="16" Source="/FModel;component/Resources/info_16x.png"/>
                        </MenuItem.Icon>
                    </MenuItem>
                </ContextMenu>
            </ListBox.ContextMenu>
        </ListBox>

        <Label Content="Name:" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="265,10,0,0"/>
        <TextBox x:Name="NameTextBox" Height="19" Margin="307,13,10,0" TextWrapping="NoWrap" VerticalAlignment="Top" Foreground="#FFEFEFEF"/>
        <Label Content="Path:" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="265,35,0,0"/>
        <TextBox x:Name="PathTextBox" Text="/FortniteGame/Content/Athena/..." Height="19" Margin="307,38,10,0" TextWrapping="NoWrap" VerticalAlignment="Top" Foreground="#FFEFEFEF"/>
        <Button x:Name="Button_AddAssetType" Content="Add" HorizontalAlignment="Right" Margin="0,62,10,0" VerticalAlignment="Top" Width="80" Height="19" Click="Button_AddAssetType_Click"/>
        <Button x:Name="Button_RemoveAssetType" Content="Remove Selected" HorizontalAlignment="Right" Margin="0,62,95,0" VerticalAlignment="Top" Width="110" Height="19" IsEnabled="False" Click="Button_RemoveAssetType_Click"/>

        <Border BorderThickness="1" BorderBrush="#7F748198" Background="#FF252D36" HorizontalAlignment="Left" Height="144" Margin="265,91,0,0" Width="411" VerticalAlignment="Top">
            <Image x:Name="ImageBox_RarityPreview" Source="/FModel;component/Resources/Template_D_N.png" UseLayoutRounding="True" HorizontalAlignment="Right" Height="140" Width="140" Margin="0,0,1,0"/>
        </Border>
        <Label Content="Language:" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="265,91,0,0"/>
        <ComboBox x:Name="ComboBox_Language" HorizontalAlignment="Left" Margin="324,94,0,0" VerticalAlignment="Top" Width="202" BorderBrush="#7F748198" Background="#FF333C46">
            <ComboBoxItem Content="English"/>
            <ComboBoxItem Content="French"/>
            <ComboBoxItem Content="German"/>
            <ComboBoxItem Content="Italian"/>
            <ComboBoxItem Content="Spanish"/>
            <ComboBoxItem Content="Spanish (LA)"/>
            <ComboBoxItem Content="Arabic"/>
            <ComboBoxItem Content="Japanese"/>
            <ComboBoxItem Content="Korean"/>
            <ComboBoxItem Content="Polish"/>
            <ComboBoxItem Content="Portuguese (Brazil)"/>
            <ComboBoxItem Content="Russian"/>
            <ComboBoxItem Content="Turkish"/>
            <ComboBoxItem Content="Chinese (S)"/>
            <ComboBoxItem Content="Traditional Chinese"/>
        </ComboBox>
        <Label Content="Rarity Design:" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="265,116,0,0"/>
        <ComboBox x:Name="ComboBox_Design" HorizontalAlignment="Left" Margin="341,119,0,0" VerticalAlignment="Top" Width="185" BorderBrush="#7F748198" Background="#FF333C46" IsReadOnly="True" SelectionChanged="UpdateImageBox">
            <ComboBoxItem Content="Default"/>
            <ComboBoxItem Content="Flat"/>
            <ComboBoxItem Content="Minimalist"/>
            <ComboBoxItem Content="Accurate Colors"/>
        </ComboBox>
        <CheckBox x:Name="bFeaturedIcon" Content="Shop Item Icon" HorizontalAlignment="Left" Margin="438,143,0,0" VerticalAlignment="Top" Checked="UpdateImageBox" Unchecked="UpdateImageBox"/>
        <CheckBox x:Name="bWatermarkIcon" Content="Watermark" HorizontalAlignment="Left" Margin="271,188,0,0" VerticalAlignment="Top" Checked="EnableDisableWatermark" Unchecked="EnableDisableWatermark"/>
        <Button x:Name="OpenFile_Button" Content="+" HorizontalAlignment="Left" Margin="352,184,0,0" VerticalAlignment="Top" Width="19" IsEnabled="False" Click="OpenFile_Button_Click"/>
        <Label x:Name="Watermark_Label" Content="File Name: " MaxWidth="240" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="376,183,0,0"/>
        <Label Content="Opacity:" HorizontalAlignment="Left" VerticalAlignment="Top" Margin="265,205,0,0"/>
        <Slider x:Name="Opacity_Slider" Style="{StaticResource Horizontal_Slider}" Thumb.DragCompleted="UpdateImageWithWatermark" HorizontalAlignment="Left" Margin="330,208,0,0" VerticalAlignment="Top" Maximum="255" Width="196" Background="#FF333C46" BorderBrush="#7F748198" Foreground="{x:Null}" IsEnabled="False"/>

        <Button Content="OK" HorizontalAlignment="Right" Margin="0,0,10,10" VerticalAlignment="Bottom" Width="80" Click="Button_Click"/>
    </Grid>
</Window>