Open files in running Rhino instance instaed of new one

Sometimes i need to open several files (but dont need them at the same time) so I think an option in settings to make double-clicked files in Explorer opened in running instance (if its running) would be nice. Which would do the same as if I did drag-drop a 3dm file into Rhino and choosed “open file”.

For Grassopper this would be even more useful - double-clicking 3dm and gh(one or even several) files would just open them in single instance.