Some windows applications, when they have a shortcut in the Windows Taskbar, when run will then ‘underline’ the taskbar icon to show that they are running. This seems a good practice when the application can only run a single instance of itself at once since it shows you that it is already running. If they can run multiple instance, the shortcut icon reflects this with a ‘stacked icon image’.
Other apps with taskbar shortcuts run and create an entirely second Icon, identical in image but with a ‘dot’ under them to show they are running. Legend falls into this category.
Since Legend can only run a single instance of itself as once on Windows, perhaps it would be better if it did not create a second icon, which has no additional purpose, yet unnecessarily ‘clutters’ the windows taskbar.