New Plugin

namespace Nop.Plugin.Widgets.Banner
{
    public partial class RouteProvider : IRouteProvider
    {
        public void RegisterRoutes(RouteCollection routes)
        {
             routes.MapRoute("Plugin.Widgets.Banner.Configure",
                 "Plugins/WidgetsBanner/Configure",
                 new { controller = "WidgetsBanner", action = "Configure" },
                 new[] { "Nop.Plugin.Widgets.Banner.Controllers" }
            );

        }
        public int Priority
        {
            get
            {
                return 0;
            }
        }
    }
}

namespace Nop.Plugin.Widgets.Banner
{
    public class BannerPlugin:BasePlugin
    {
        public override void Install()
        {
            base.Install();
        }
        public override void Uninstall()
        {
            base.Uninstall();
        }
    }
}

namespace Nop.Plugin.Widgets.Banner.Models
{
    public class ConfigurationModel
    {
         public ConfigurationModel()
        {
            
        }
        public string Id { get; set; }

        [NopResourceDisplayName("Plugins.Widgets.Banner.Name")]
        public string Name { get; set; }
    }
}

namespace Nop.Plugin.Widgets.Banner.Controllers
{
    public class WidgetsBannerController : Controller
    {
        public ActionResult Configure()
        {
            var model = new ConfigurationModel();
            model.Id = "0";
            model.Name = "Test";
            return View("Nop.Plugin.Widgets.Banner.Views.Configure",model);
        }
    }
}

public class BannerPlugin:BasePlugin, IWidetPlugin
{
 public IList<string> GetWidgetZones()
 {
   return new List<string>() { "content_before", "header_menu_before" , "etc etc etc"  };
 }

 public void GetConfigurationRoute( out string actionName , out string controllerName , out RouteValueDictionary    routeValues )
 {
   actionName = "Configure";
   controllerName = "BannerPlugin";
   routeValues = new RouteValueDictionary()
   {
      { "Namespaces" , "Nop.Plugin.Widgets.Banner.Controllers" } ,
      { "area" , null }
   };
 }
}