Middle click the icon in the taskbar to open a new instance of the app. It does mean you need to pin the app to the taskbar or open it first from the start menu

Middle click the icon in the taskbar to open a new instance of the app. It does mean you need to pin the app to the taskbar or open it first from the start menu, but that's what you're doing anyway. Just saves you navigating the start menu for subsequent launches.