diff --git a/PROMS/VEPROMS User Interface/frmVersionsProperties.cs b/PROMS/VEPROMS User Interface/frmVersionsProperties.cs
index 9014e85c..48c5fa5f 100644
--- a/PROMS/VEPROMS User Interface/frmVersionsProperties.cs	
+++ b/PROMS/VEPROMS User Interface/frmVersionsProperties.cs	
@@ -1086,6 +1086,7 @@ namespace VEPROMS
 			btnFmtSettings.Checked = false;
 			btnLibDocs.Checked = false;
 			btnApplicability.Checked = false;
+			btnMergedOutputSettngs.Checked = false;		//B2019-074: turn off button when another is selected
 		}
 
 		/// <summary>