diff --git a/playbook/shopfloor-setup/Standard/01-eDNC.ps1 b/playbook/shopfloor-setup/Standard/01-eDNC.ps1
index 38bd372..c8f0cf5 100644
--- a/playbook/shopfloor-setup/Standard/01-eDNC.ps1
+++ b/playbook/shopfloor-setup/Standard/01-eDNC.ps1
@@ -45,7 +45,11 @@ if (-not (Test-Path $edncDir)) {
 }
 
 # --- Find installer ---
-$edncMsi     = Get-ChildItem -Path $edncDir -Filter "eDNC-*.msi" | Select-Object -First 1
+# Filter is eDNC*.msi (no dash) so we match both vendor naming styles:
+# eDNC-6.4.3.msi (dash) and eDNC_6-4-5.msi (underscore). Imaging dir should
+# only contain ONE version at a time; rollback to a prior version is handled
+# post-imaging via the SFLD share's standard-machine/apps/ alternates.
+$edncMsi     = Get-ChildItem -Path $edncDir -Filter "eDNC*.msi" | Select-Object -First 1
 $emxInfo     = Join-Path $edncDir "eMxInfo.txt"
 
 # --- 1. Install eDNC ---
@@ -54,7 +58,7 @@ if ($edncMsi) {
     $p = Start-Process -FilePath "msiexec.exe" -ArgumentList "/i `"$($edncMsi.FullName)`" /qn /norestart LAUNCHNTLARS=false SITESELECTED=`"$siteName`"" -Wait -PassThru
     Write-Host "  eDNC exit code: $($p.ExitCode)"
 } else {
-    Write-Warning "eDNC installer not found in $edncDir (expected eDNC-*.msi)"
+    Write-Warning "eDNC installer not found in $edncDir (expected eDNC*.msi)"
 }
 
 # --- 2. Mirror x86 install to 64-bit Program Files (app uses hardcoded paths) ---