I updated, and sent an mp3 file from explorer to play with MB which was closed a few seconds before, so wasn't a cold restart, and it takes 8-9 seconds. While 1by1 takes 1 second. The startup of the .net is the real problem when you want to listen a file executed from explorer.
So, sadly, it doesn't solves the startup time problem
I use 1by1 as a player for that moments i want to listen one file (or a folder) almost instantly without the need of having it running from before.