Update or Remove Commands of Menu / ExtendScript

Hi Community,

I am having a problem with updating the commands for specific menu. When I remove menu and recreate another one with same name all commands are staying the same.

I tried 2 options of deleteing menu:

// option 1

RemoveMenu("!StructuredTextContextMenu", "Menu1"); 
UpdateMenus();

// option 2
var oMenu = app.GetNamedMenu("!StructuredTextContextMenu");
var oAltMenu = app.GetNamedMenu("Menu1");
if (oAltMenu.ObjectValid()) { 
  oMenu.Delete(oAltMenu);
  UpdateMenus();
} 

I tried to remove commands as well, but this brings to problems:

oCommand = app.GetNamedCommand('cmd');

// option 1, does not delete command 
oCommand.Delete();

// option 2, FrameMaker crashes , though no errors in ESTK
RemoveMenu("Menu1", oCommand.Name)
UpdateMenus();

Does anyone know how to update the list of commands in menu?

Thanks.