diff --git a/ArcFormats/AZSys/ArcAZSys.cs b/ArcFormats/AZSys/ArcAZSys.cs
index 963c8239..75a9e804 100644
--- a/ArcFormats/AZSys/ArcAZSys.cs
+++ b/ArcFormats/AZSys/ArcAZSys.cs
@@ -69,12 +69,14 @@ namespace GameRes.Formats.AZSys
             Extensions = new string[] { "arc" };
         }
 
-        public static Dictionary<string, uint> KnownKeys = new Dictionary<string, uint>();
+        static AsbScheme DefaultScheme = new AsbScheme { KnownKeys = new Dictionary<string, uint>() };
+
+        public static Dictionary<string, uint> KnownKeys { get { return DefaultScheme.KnownKeys; } }
 
         public override ResourceScheme Scheme
         {
-            get { return new AsbScheme { KnownKeys = KnownKeys }; }
-            set { KnownKeys = ((AsbScheme)value).KnownKeys; }
+            get { return DefaultScheme; }
+            set { DefaultScheme = (AsbScheme)value; }
         }
 
         public override ArcFile TryOpen (ArcView file)
diff --git a/ArcFormats/AZSys/WidgetAZ.xaml b/ArcFormats/AZSys/WidgetAZ.xaml
index 0d10c1d4..427cab2c 100644
--- a/ArcFormats/AZSys/WidgetAZ.xaml
+++ b/ArcFormats/AZSys/WidgetAZ.xaml
@@ -3,5 +3,5 @@
       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
       xmlns:p="clr-namespace:GameRes.Formats.Properties">
     <ComboBox Name="Scheme" Width="180" ItemsSource="{Binding}"
-              SelectedValue="{Binding Source={x:Static p:Settings.Default}, Path=AZScheme, Mode=TwoWay}"/>
+              SelectedValue="{Binding Source={x:Static p:Settings.Default}, Path=AZScriptScheme, Mode=TwoWay}"/>
 </StackPanel>