diff --git a/AyaNovaQBI/Timestamp.cs b/AyaNovaQBI/Timestamp.cs
index e395258..0b839af 100644
--- a/AyaNovaQBI/Timestamp.cs
+++ b/AyaNovaQBI/Timestamp.cs
@@ -22,7 +22,7 @@ namespace AyaNovaQBI
         /// <remarks>
         /// Do not modify the definition of BuildAt as your changes will be discarded.
         /// </remarks>
-        public static DateTime BuildAt { get { return new DateTime(637914944578794775); } } //--**
+        public static DateTime BuildAt { get { return new DateTime(637914972292295086); } } //--**
         /// <summary>
         /// The program that time stamped it.
         /// </summary>
diff --git a/AyaNovaQBI/util.cs b/AyaNovaQBI/util.cs
index ed1a76c..edd6662 100644
--- a/AyaNovaQBI/util.cs
+++ b/AyaNovaQBI/util.cs
@@ -493,7 +493,17 @@ namespace AyaNovaQBI
             }
 
 
-            //check if build date is within licensed date (how did I do that automated build date thing?)
+            //check if build date is within maintenance and updates expiry date
+            if(ALicense.maintenanceExpiration < Timestamp.BuildAt)
+            {
+                initErrors.AppendLine("NOT LICENSED!\r\n\r\nThis QBI plugin was built " +
+                    Timestamp.BuildAt.ToString("g") + "\r\n" +
+                    "but the licensed support and updates subscription has ended on " +
+                   ALicense.maintenanceExpiration.ToLocalTime().ToString("g") + "\r\n" +
+                "\r\nDowngrade back to your previous licensed QBI version or\r\npurchase a support and updates subscription to continue using this version of QBI.");
+                return false;
+            }
+
             //  copy timestamp.cs and the createtimestamp.exe utility from v7 qbi and create build event to run it here and do same thing
             //check that AyaNova version matches required minimum for this QBI (