--- a/ServerMonitor/Forms/SettingsForm.cs	Tue Jun 09 20:59:00 2020 -0400
+++ b/ServerMonitor/Forms/SettingsForm.cs	Sat Jun 13 13:28:20 2020 -0400
@@ -48,6 +48,8 @@
             ErrorSoundComboBox.SelectedIndex = getSoundSettingIndex(ErrorSoundComboBox);
             WarningSoundComboBox.SelectedIndex = getSoundSettingIndex(WarningSoundComboBox);
             InformationSoundComboBox.SelectedIndex = getSoundSettingIndex(InformationSoundComboBox);
+
+            AutorunCheckBox.Enabled = !Helpers.IsMono();
         }
 
         /// <summary>Gets whether an autorun registry key for this program exists.</summary>
@@ -55,6 +57,10 @@
         private bool GetAutorun()
         {
             RegistryKey key = Registry.CurrentUser.OpenSubKey(autorunKey, false);
+            if (key == null)
+            {
+                return false;
+            }
             string value = (string)key.GetValue(autorunName, string.Empty);
             return value.StartsWith(Application.ExecutablePath);
         }
@@ -63,6 +69,11 @@
         /// <param name="autorun">Whether autorun should be enabled or disabled.</param>
         private void SetAutorun(bool autorun)
         {
+            if (Helpers.IsMono())
+            {
+                return;
+            }
+
             RegistryKey key = Registry.CurrentUser.OpenSubKey(autorunKey, true);
             if (autorun)
                 key.SetValue(autorunName, Application.ExecutablePath.ToString());