diff --git a/playbook/shopfloor-setup/gea-shopfloor-heattreat/02-Setup-HeatTreat.ps1 b/playbook/shopfloor-setup/gea-shopfloor-heattreat/02-Setup-HeatTreat.ps1
index 2d43059..f08768c 100644
--- a/playbook/shopfloor-setup/gea-shopfloor-heattreat/02-Setup-HeatTreat.ps1
+++ b/playbook/shopfloor-setup/gea-shopfloor-heattreat/02-Setup-HeatTreat.ps1
@@ -1,6 +1,6 @@
 # 02-Setup-HeatTreat.ps1 - HeatTreat app setup (runs AFTER 01-eDNC.ps1).
 #
-# HeatTreat_6.2.1.msi is a WiX/GE Aviation installer, same lineage as Mark
+# HeatTreat_6-4-9.msi is a WiX/GE Aviation installer, same lineage as Mark
 # and eDNC. Decompiled findings:
 #   - LAUNCHNTLARS=true by default and the LaunchNtlars custom action fires
 #     under /qn (condition NOT Installed AND LAUNCHNTLARS="true"). Pass
@@ -34,7 +34,7 @@ if (Test-Path $pxeStatusLib) {
 $payloadDir = Join-Path $PSScriptRoot 'HeatTreat'
 
 # ============================================================================
-# Install HeatTreat_6.2.1.msi
+# Install HeatTreat_6-4-9.msi
 # ============================================================================
 $htMsi = Get-ChildItem -Path $payloadDir -Filter 'HeatTreat*.msi' -File -ErrorAction SilentlyContinue | Select-Object -First 1
 if ($htMsi) {
diff --git a/playbook/shopfloor-setup/gea-shopfloor-heattreat/HeatTreat/HeatTreat_6.2.1.msi b/playbook/shopfloor-setup/gea-shopfloor-heattreat/HeatTreat/HeatTreat_6-4-9.msi
similarity index 68%
rename from playbook/shopfloor-setup/gea-shopfloor-heattreat/HeatTreat/HeatTreat_6.2.1.msi
rename to playbook/shopfloor-setup/gea-shopfloor-heattreat/HeatTreat/HeatTreat_6-4-9.msi
index bd2fb3f..c2be89f 100755
Binary files a/playbook/shopfloor-setup/gea-shopfloor-heattreat/HeatTreat/HeatTreat_6.2.1.msi and b/playbook/shopfloor-setup/gea-shopfloor-heattreat/HeatTreat/HeatTreat_6-4-9.msi differ