diff --git a/RhSolutions.AddIn/Tools/EventsUtil.cs b/RhSolutions.AddIn/Tools/EventsUtil.cs
index 31063e4..a32dc47 100644
--- a/RhSolutions.AddIn/Tools/EventsUtil.cs
+++ b/RhSolutions.AddIn/Tools/EventsUtil.cs
@@ -10,6 +10,7 @@ internal static class EventsUtil
 		RhSolutionsAddIn.Excel.SheetSelectionChange += RefreshExportButton;
 		RhSolutionsAddIn.Excel.SheetActivate += RefreshButtons;
 		RhSolutionsAddIn.Excel.WorkbookActivate += RefreshButtons;
+		RhSolutionsAddIn.Excel.WorkbookDeactivate += RefreshButtons;
 		RhSolutionsAddIn.Configuration.OnSettingsChange += RefreshSettingTitle;
 	}
 
@@ -18,6 +19,7 @@ internal static class EventsUtil
 		RhSolutionsAddIn.Excel.SheetSelectionChange -= RefreshExportButton;
 		RhSolutionsAddIn.Excel.SheetActivate -= RefreshButtons;
 		RhSolutionsAddIn.Excel.WorkbookActivate -= RefreshButtons;
+		RhSolutionsAddIn.Excel.WorkbookDeactivate -= RefreshButtons;
 		RhSolutionsAddIn.Configuration.OnSettingsChange -= RefreshSettingTitle;
 	}