diff --git a/Crypto Notepad/SettingsForm.Designer.cs b/Crypto Notepad/SettingsForm.Designer.cs
index ad93ff1..3b380a5 100644
--- a/Crypto Notepad/SettingsForm.Designer.cs	
+++ b/Crypto Notepad/SettingsForm.Designer.cs	
@@ -54,6 +54,7 @@ private void InitializeComponent()
             this.tabPage3 = new System.Windows.Forms.TabPage();
             this.checkBox2 = new System.Windows.Forms.CheckBox();
             this.checkBox1 = new System.Windows.Forms.CheckBox();
+            this.button1 = new System.Windows.Forms.Button();
             this.tabControl1.SuspendLayout();
             this.tabPage1.SuspendLayout();
             this.tabPage2.SuspendLayout();
@@ -79,7 +80,7 @@ private void InitializeComponent()
             this.saveSettingsButton.Location = new System.Drawing.Point(183, 225);
             this.saveSettingsButton.Name = "saveSettingsButton";
             this.saveSettingsButton.Size = new System.Drawing.Size(75, 23);
-            this.saveSettingsButton.TabIndex = 2;
+            this.saveSettingsButton.TabIndex = 4;
             this.saveSettingsButton.Text = "Save";
             this.saveSettingsButton.UseVisualStyleBackColor = true;
             this.saveSettingsButton.Click += new System.EventHandler(this.saveSettingsButton_Click);
@@ -103,6 +104,7 @@ private void InitializeComponent()
             this.tabControl1.SelectedIndex = 0;
             this.tabControl1.Size = new System.Drawing.Size(260, 218);
             this.tabControl1.TabIndex = 4;
+            this.tabControl1.SelectedIndexChanged += new System.EventHandler(this.tabControl1_SelectedIndexChanged);
             // 
             // tabPage1
             // 
@@ -326,9 +328,9 @@ private void InitializeComponent()
             this.checkBox2.Enabled = false;
             this.checkBox2.Location = new System.Drawing.Point(7, 47);
             this.checkBox2.Name = "checkBox2";
-            this.checkBox2.Size = new System.Drawing.Size(120, 17);
+            this.checkBox2.Size = new System.Drawing.Size(117, 17);
             this.checkBox2.TabIndex = 1;
-            this.checkBox2.Text = "Auto Check Update";
+            this.checkBox2.Text = "Auto check update";
             this.checkBox2.UseVisualStyleBackColor = true;
             // 
             // checkBox1
@@ -336,16 +338,27 @@ private void InitializeComponent()
             this.checkBox1.AutoSize = true;
             this.checkBox1.Location = new System.Drawing.Point(7, 18);
             this.checkBox1.Name = "checkBox1";
-            this.checkBox1.Size = new System.Drawing.Size(166, 17);
+            this.checkBox1.Size = new System.Drawing.Size(179, 17);
             this.checkBox1.TabIndex = 0;
-            this.checkBox1.Text = "Associate with .enp extension";
+            this.checkBox1.Text = "Associate with enp file extension";
             this.checkBox1.UseVisualStyleBackColor = true;
             // 
+            // button1
+            // 
+            this.button1.Location = new System.Drawing.Point(6, 225);
+            this.button1.Name = "button1";
+            this.button1.Size = new System.Drawing.Size(98, 23);
+            this.button1.TabIndex = 5;
+            this.button1.Text = "Reset to defaults";
+            this.button1.UseVisualStyleBackColor = true;
+            this.button1.Click += new System.EventHandler(this.button1_Click);
+            // 
             // SettingsForm
             // 
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
             this.ClientSize = new System.Drawing.Size(263, 254);
+            this.Controls.Add(this.button1);
             this.Controls.Add(this.tabControl1);
             this.Controls.Add(this.saveSettingsButton);
             this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
@@ -395,5 +408,6 @@ private void InitializeComponent()
         private System.Windows.Forms.ComboBox comboBox4;
         private System.Windows.Forms.TextBox textBox2;
         private System.Windows.Forms.Label label7;
+        private System.Windows.Forms.Button button1;
     }
 }
\ No newline at end of file
diff --git a/Crypto Notepad/SettingsForm.cs b/Crypto Notepad/SettingsForm.cs
index b4477cd..cdcf1a3 100644
--- a/Crypto Notepad/SettingsForm.cs	
+++ b/Crypto Notepad/SettingsForm.cs	
@@ -2,6 +2,7 @@
 using System;
 using System.Drawing;
 using System.IO;
+using System.Media;
 using System.Reflection;
 using System.Windows.Forms;
 
@@ -9,7 +10,6 @@ namespace Crypto_Notepad
 {
     public partial class SettingsForm : Form
     {
-
         Properties.Settings ps = Properties.Settings.Default;
         MainWindow ma = new MainWindow();
 
@@ -40,51 +40,42 @@ private void SettingsForm_Load(object sender, EventArgs e)
 
         private void saveSettingsButton_Click(object sender, EventArgs e)
         {
-            if (checkBox1.Checked == true)
-            {
-                AssociateExtension(Assembly.GetEntryAssembly().Location, "enp");
-            }
-
-            if (checkBox1.Checked == false)
-            {
-                DissociateExtension(Assembly.GetEntryAssembly().Location, "enp");
-            }
-
-            ps.RichForeColor = panel1.BackColor;
-            ps.RichBackColor = panel2.BackColor;
-            ps.HighlightsColor = panel3.BackColor;
-            ps.RichTextFont = comboBox1.Text;
-            ps.RichTextSize =  Convert.ToInt32(comboBox2.Text.ToString());
-            ps.AssociateCheck = checkBox1.Checked;
-            ps.HashAlgorithm = comboBox4.Text;
-            ps.KeySize = Convert.ToInt32(comboBox3.Text.ToString());
-            ps.TheSalt = textBox1.Text;
-            ps.PasswordIterations = Convert.ToInt32(textBox2.Text.ToString());
-            ps.Save();
-
-            MainWindow.settingsChanged = true;
-
-            this.Hide();
+            SetSettings("Save");
         }
 
         public static void AssociateExtension(string applicationExecutablePath, string extension)
-        {          
-            RegistryKey key = Registry.CurrentUser.OpenSubKey("Software\\Classes", true);
-            key.CreateSubKey("." + extension).SetValue(string.Empty, extension + "_auto_file");
-            key = key.CreateSubKey(extension + "_auto_file");
-            key.CreateSubKey("DefaultIcon").SetValue(string.Empty, Path.GetDirectoryName(Application.ExecutablePath) + "\\EncryptPad.exe" + ",0");
-            key = key.CreateSubKey("Shell");
-            key.SetValue(string.Empty, "Open");
-            key = key.CreateSubKey("Open");
-            key.CreateSubKey("Command").SetValue(string.Empty, "\"" + applicationExecutablePath + "\" \"%1\"");
-            key.CreateSubKey("ddeexec\\Topic").SetValue(string.Empty, "System");
+        {
+            try
+            {
+                RegistryKey key = Registry.CurrentUser.OpenSubKey("Software\\Classes", true);
+                key.CreateSubKey("." + extension).SetValue(string.Empty, extension + "_auto_file");
+                key = key.CreateSubKey(extension + "_auto_file");
+                key.CreateSubKey("DefaultIcon").SetValue(string.Empty, Path.GetDirectoryName(Application.ExecutablePath) + "\\Crypto Notepad.exe" + ",0");
+                key = key.CreateSubKey("Shell");
+                key.SetValue(string.Empty, "Open");
+                key = key.CreateSubKey("Open");
+                key.CreateSubKey("Command").SetValue(string.Empty, "\"" + applicationExecutablePath + "\" \"%1\"");
+                key.CreateSubKey("ddeexec\\Topic").SetValue(string.Empty, "System");
+            }
+            catch (Exception)
+            {
+
+            }       
         }
 
         public static void DissociateExtension(string applicationExecutablePath, string extension)
         {
-            RegistryKey key = Registry.CurrentUser.OpenSubKey("Software\\Classes", true);
-            key.DeleteSubKeyTree(extension + "_auto_file");
-            key.DeleteSubKeyTree("." + extension);
+            try
+            {
+                RegistryKey key = Registry.CurrentUser.OpenSubKey("Software\\Classes", true);
+                key.DeleteSubKeyTree(extension + "_auto_file");
+                key.DeleteSubKeyTree("." + extension);
+            }
+            catch (Exception)
+            {
+
+            }
+
         }
 
         private void panel1_Click_1(object sender, EventArgs e)
@@ -116,5 +107,74 @@ private void panel3_Click(object sender, EventArgs e)
             }
             panel3.BackColor = colorDialog1.Color;
         }
+
+        private void tabControl1_SelectedIndexChanged(object sender, EventArgs e)
+        {
+            if ((tabControl1.SelectedTab == tabControl1.TabPages["tabPage2"]) && (ps.WarningMsg == false))
+            {
+                SystemSounds.Beep.Play();
+                WarningMsgBox w = new WarningMsgBox();
+                w.ShowDialog(this);
+            }
+        }
+
+        private void button1_Click(object sender, EventArgs e)
+        {
+            using (new CenterWinDialog(this))
+            {
+                DialogResult result = MessageBox.Show("Reset to defaults?", "", MessageBoxButtons.YesNo, MessageBoxIcon.Error);
+
+                if (result == DialogResult.Yes)
+                {
+                    SetSettings("Default");
+                }
+            }
+        }
+
+        private void SetSettings(string value)
+        {
+            if (value == "Save")
+            {
+                if (checkBox1.Checked == true)
+                {
+                    AssociateExtension(Assembly.GetEntryAssembly().Location, "enp");
+                }
+
+                if (checkBox1.Checked == false)
+                {
+                    DissociateExtension(Assembly.GetEntryAssembly().Location, "enp");
+                }
+
+                ps.RichForeColor = panel1.BackColor;
+                ps.RichBackColor = panel2.BackColor;
+                ps.HighlightsColor = panel3.BackColor;
+                ps.RichTextFont = comboBox1.Text;
+                ps.RichTextSize = Convert.ToInt32(comboBox2.Text.ToString());
+                ps.AssociateCheck = checkBox1.Checked;
+                ps.HashAlgorithm = comboBox4.Text;
+                ps.KeySize = Convert.ToInt32(comboBox3.Text.ToString());
+                ps.TheSalt = textBox1.Text;
+                ps.PasswordIterations = Convert.ToInt32(textBox2.Text.ToString());
+                ps.Save();
+
+                MainWindow.settingsChanged = true;
+
+                this.Hide();
+            }
+
+            if (value == "Default")
+            {
+                checkBox1.Checked = false;
+                panel1.BackColor = Color.FromArgb(228, 228, 228);
+                panel2.BackColor = Color.FromArgb(56, 56, 56);
+                panel3.BackColor = Color.FromArgb(101, 51, 6);
+                comboBox1.Text = "Consolas";
+                comboBox2.Text = 11.ToString();
+                checkBox1.Checked = false;
+                comboBox4.Text = "SHA1";
+                comboBox3.Text = 192.ToString();
+                textBox2.Text = 2.ToString();
+            }
+        }
     }
 }
diff --git a/Crypto Notepad/WarningMsgBox.Designer.cs b/Crypto Notepad/WarningMsgBox.Designer.cs
new file mode 100644
index 0000000..803b7ae
--- /dev/null
+++ b/Crypto Notepad/WarningMsgBox.Designer.cs	
@@ -0,0 +1,119 @@
+namespace Crypto_Notepad
+{
+    partial class WarningMsgBox
+    {
+        /// <summary>
+        /// Required designer variable.
+        /// </summary>
+        private System.ComponentModel.IContainer components = null;
+
+        /// <summary>
+        /// Clean up any resources being used.
+        /// </summary>
+        /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
+        protected override void Dispose(bool disposing)
+        {
+            if (disposing && (components != null))
+            {
+                components.Dispose();
+            }
+            base.Dispose(disposing);
+        }
+
+        #region Windows Form Designer generated code
+
+        /// <summary>
+        /// Required method for Designer support - do not modify
+        /// the contents of this method with the code editor.
+        /// </summary>
+        private void InitializeComponent()
+        {
+            this.button1 = new System.Windows.Forms.Button();
+            this.panel1 = new System.Windows.Forms.Panel();
+            this.label1 = new System.Windows.Forms.Label();
+            this.pictureBox1 = new System.Windows.Forms.PictureBox();
+            this.checkBox1 = new System.Windows.Forms.CheckBox();
+            this.panel1.SuspendLayout();
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
+            this.SuspendLayout();
+            // 
+            // button1
+            // 
+            this.button1.Location = new System.Drawing.Point(209, 98);
+            this.button1.Name = "button1";
+            this.button1.Size = new System.Drawing.Size(75, 23);
+            this.button1.TabIndex = 0;
+            this.button1.Text = "OK";
+            this.button1.UseVisualStyleBackColor = true;
+            this.button1.Click += new System.EventHandler(this.button1_Click);
+            // 
+            // panel1
+            // 
+            this.panel1.BackColor = System.Drawing.Color.White;
+            this.panel1.Controls.Add(this.label1);
+            this.panel1.Controls.Add(this.pictureBox1);
+            this.panel1.Location = new System.Drawing.Point(0, 0);
+            this.panel1.Name = "panel1";
+            this.panel1.Size = new System.Drawing.Size(294, 87);
+            this.panel1.TabIndex = 1;
+            // 
+            // label1
+            // 
+            this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+            this.label1.Location = new System.Drawing.Point(84, 7);
+            this.label1.Name = "label1";
+            this.label1.Size = new System.Drawing.Size(206, 69);
+            this.label1.TabIndex = 1;
+            this.label1.Text = "If you change settings in this tab, decrypt the previously encrypted files will n" +
+    "ot be possible.";
+            // 
+            // pictureBox1
+            // 
+            this.pictureBox1.Image = global::Crypto_Notepad.Properties.Resources.Warning_icon_hi;
+            this.pictureBox1.Location = new System.Drawing.Point(7, 7);
+            this.pictureBox1.Name = "pictureBox1";
+            this.pictureBox1.Size = new System.Drawing.Size(71, 69);
+            this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
+            this.pictureBox1.TabIndex = 0;
+            this.pictureBox1.TabStop = false;
+            // 
+            // checkBox1
+            // 
+            this.checkBox1.AutoSize = true;
+            this.checkBox1.Location = new System.Drawing.Point(12, 101);
+            this.checkBox1.Name = "checkBox1";
+            this.checkBox1.Size = new System.Drawing.Size(172, 17);
+            this.checkBox1.TabIndex = 2;
+            this.checkBox1.Text = "Don\'t show this message again";
+            this.checkBox1.UseVisualStyleBackColor = true;
+            // 
+            // WarningMsgBox
+            // 
+            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
+            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
+            this.ClientSize = new System.Drawing.Size(294, 130);
+            this.Controls.Add(this.checkBox1);
+            this.Controls.Add(this.panel1);
+            this.Controls.Add(this.button1);
+            this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedDialog;
+            this.MaximizeBox = false;
+            this.MinimizeBox = false;
+            this.Name = "WarningMsgBox";
+            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterParent;
+            this.Text = "Warning";
+            this.panel1.ResumeLayout(false);
+            ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
+            this.ResumeLayout(false);
+            this.PerformLayout();
+
+        }
+
+        #endregion
+
+        private System.Windows.Forms.Button button1;
+        private System.Windows.Forms.Panel panel1;
+        private System.Windows.Forms.CheckBox checkBox1;
+        private System.Windows.Forms.PictureBox pictureBox1;
+        private System.Windows.Forms.Label label1;
+    }
+}
\ No newline at end of file
diff --git a/Crypto Notepad/WarningMsgBox.cs b/Crypto Notepad/WarningMsgBox.cs
new file mode 100644
index 0000000..923caa2
--- /dev/null
+++ b/Crypto Notepad/WarningMsgBox.cs	
@@ -0,0 +1,25 @@
+using System;
+using System.Windows.Forms;
+
+namespace Crypto_Notepad
+{
+    public partial class WarningMsgBox : Form
+    {
+        Properties.Settings ps = Properties.Settings.Default;
+
+        public WarningMsgBox()
+        {
+            InitializeComponent();
+        }
+
+        private void button1_Click(object sender, EventArgs e)
+        {
+            if (checkBox1.Checked == true)
+            {
+                ps.WarningMsg = true;
+                ps.Save();
+            }
+            this.Close();
+        }
+    }
+}
diff --git a/Crypto Notepad/WarningMsgBox.resx b/Crypto Notepad/WarningMsgBox.resx
new file mode 100644
index 0000000..1af7de1
--- /dev/null
+++ b/Crypto Notepad/WarningMsgBox.resx	
@@ -0,0 +1,120 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:import namespace="http://www.w3.org/XML/1998/namespace" />
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" use="required" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+              <xsd:attribute ref="xml:space" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>
\ No newline at end of file