diff --git a/ACOM Controller/MainWindow.xaml.cs b/ACOM Controller/MainWindow.xaml.cs
index 1338c73..ba671ff 100644
--- a/ACOM Controller/MainWindow.xaml.cs	
+++ b/ACOM Controller/MainWindow.xaml.cs	
@@ -146,6 +146,7 @@ public void Configuration(string comPort, string ampModel, bool alwaysontop, boo
             // Default to COM4 if config file is invalid
             Port = new SerialPort(comPort == "" ? "COM1" : comPort, 9600, Parity.None, 8, StopBits.One);
 
+            // Keep DTR and RTS low to avoid blocking front panel power button
             Port.DtrEnable = false;
             Port.RtsEnable = false;
 
diff --git a/ACOM Controller/Properties/Settings.Designer.cs b/ACOM Controller/Properties/Settings.Designer.cs
index 5b17a14..55fe0e7 100644
--- a/ACOM Controller/Properties/Settings.Designer.cs	
+++ b/ACOM Controller/Properties/Settings.Designer.cs	
@@ -12,7 +12,7 @@ namespace ACOM_Controller.Properties {
     
     
     [global::System.Runtime.CompilerServices.CompilerGeneratedAttribute()]
-    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "16.4.0.0")]
+    [global::System.CodeDom.Compiler.GeneratedCodeAttribute("Microsoft.VisualStudio.Editors.SettingsDesigner.SettingsSingleFileGenerator", "16.10.0.0")]
     internal sealed partial class Settings : global::System.Configuration.ApplicationSettingsBase {
         
         private static Settings defaultInstance = ((Settings)(global::System.Configuration.ApplicationSettingsBase.Synchronized(new Settings())));
@@ -49,7 +49,7 @@ public double Left {
         
         [global::System.Configuration.UserScopedSettingAttribute()]
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
-        [global::System.Configuration.DefaultSettingValueAttribute("COM4")]
+        [global::System.Configuration.DefaultSettingValueAttribute("COM1")]
         public string ComPort {
             get {
                 return ((string)(this["ComPort"]));
@@ -61,7 +61,7 @@ public string ComPort {
         
         [global::System.Configuration.UserScopedSettingAttribute()]
         [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
-        [global::System.Configuration.DefaultSettingValueAttribute("600S")]
+        [global::System.Configuration.DefaultSettingValueAttribute("700S")]
         public string AmplifierModel {
             get {
                 return ((string)(this["AmplifierModel"]));
diff --git a/ACOM Controller/Properties/Settings.settings b/ACOM Controller/Properties/Settings.settings
index 06c7f60..383657e 100644
--- a/ACOM Controller/Properties/Settings.settings	
+++ b/ACOM Controller/Properties/Settings.settings	
@@ -9,10 +9,10 @@
       <Value Profile="(Default)">100</Value>
     </Setting>
     <Setting Name="ComPort" Type="System.String" Scope="User">
-      <Value Profile="(Default)">COM4</Value>
+      <Value Profile="(Default)">COM1</Value>
     </Setting>
     <Setting Name="AmplifierModel" Type="System.String" Scope="User">
-      <Value Profile="(Default)">600S</Value>
+      <Value Profile="(Default)">700S</Value>
     </Setting>
     <Setting Name="AlwaysOnTop" Type="System.Boolean" Scope="User">
       <Value Profile="(Default)">True</Value>
diff --git a/ACOM Controller/app.config b/ACOM Controller/app.config
index b6d04f8..95e23d6 100644
--- a/ACOM Controller/app.config	
+++ b/ACOM Controller/app.config	
@@ -14,10 +14,10 @@
                 <value>100</value>
             </setting>
             <setting name="ComPort" serializeAs="String">
-                <value>COM4</value>
+                <value>COM1</value>
             </setting>
             <setting name="AmplifierModel" serializeAs="String">
-                <value>600S</value>
+                <value>700S</value>
             </setting>
             <setting name="AlwaysOnTop" serializeAs="String">
                 <value>True</value>