diff --git a/ITC81DB_2/Controls/CenterInformation/ControlCenterInforSystem.cs b/ITC81DB_2/Controls/CenterInformation/ControlCenterInforSystem.cs
index 0685837..2e9ef2b 100644
--- a/ITC81DB_2/Controls/CenterInformation/ControlCenterInforSystem.cs
+++ b/ITC81DB_2/Controls/CenterInformation/ControlCenterInforSystem.cs
@@ -63,7 +63,7 @@ namespace ITC81DB_2.Controls
         private void DefaultSetting()
         {
             this.labelSerialNo.Text = this.ParentForm.ParentForm.SystemConfig.SerialNumber;
-            this.labelDisplayVer.Text = "3.1.4";
+            this.labelDisplayVer.Text = "3.1.5";
         }
 
         public void UpdateMainBoardVersionDisplay(string version)
diff --git a/ITC81DB_2/Forms/FormMainDisplay.cs b/ITC81DB_2/Forms/FormMainDisplay.cs
index 0b642e4..6094c34 100644
--- a/ITC81DB_2/Forms/FormMainDisplay.cs
+++ b/ITC81DB_2/Forms/FormMainDisplay.cs
@@ -427,12 +427,20 @@ namespace ITC81DB_2.Forms
             }
 
             // Icon - Feedback
-            if (this.MainFeedback.IsUsingFeedback() == true) // Feedback
+            try
             {
-                this.pictureBoxFeedbackDisable.Visible = false;
-                this.pictureBoxFeedbackEnable.Visible = true;
+                if (this.MainFeedback.IsUsingFeedback() == true) // Feedback
+                {
+                    this.pictureBoxFeedbackDisable.Visible = false;
+                    this.pictureBoxFeedbackEnable.Visible = true;
+                }
+                else
+                {
+                    this.pictureBoxFeedbackDisable.Visible = true;
+                    this.pictureBoxFeedbackEnable.Visible = false;
+                }
             }
-            else
+            catch
             {
                 this.pictureBoxFeedbackDisable.Visible = true;
                 this.pictureBoxFeedbackEnable.Visible = false;
diff --git a/ITC81DB_2/Version.txt b/ITC81DB_2/Version.txt
index 22f9a68..e03f8dc 100644
--- a/ITC81DB_2/Version.txt
+++ b/ITC81DB_2/Version.txt
@@ -14,6 +14,11 @@
 	2¿­ ±âº»Çü ÄÁº£¾î °è·®±â
 */
 
+@ Ver 3.1.5 by CJY
+	- 2025.09.02
+	- Ver 3.1.4 Modify
+	- Feedback ¾ÆÀÌÄÜ Ç¥½Ã ¹ö±× ¼öÁ¤
+
 @ Ver 3.1.4 by CJY
 	- 2025.02.27
 	- Ver 3.1.3 Modify
diff --git a/ITC81DB_2/bin/Release/ITC81DB_2.exe b/ITC81DB_2/bin/Release/ITC81DB_2.exe
index 6e6540a..c88c509 100644
Binary files a/ITC81DB_2/bin/Release/ITC81DB_2.exe and b/ITC81DB_2/bin/Release/ITC81DB_2.exe differ
diff --git a/ITC81DB_2/obj/Release/ITC81DB_2.exe b/ITC81DB_2/obj/Release/ITC81DB_2.exe
index 6e6540a..c88c509 100644
Binary files a/ITC81DB_2/obj/Release/ITC81DB_2.exe and b/ITC81DB_2/obj/Release/ITC81DB_2.exe differ