Hi - glad you like the site. Thanks for the suggestion. Adding a facility to group your routes into folders is something thay is already on our feature requests list (number 63), so please add your vote to move it up the list.
John
Thank you for such a good online plot route!
Please have it so you can have folders for Private and Public routes. So you have routes shared with friends or those that you allow. And duplicate routes to share for the Public so you don't need to recreate the route.