Better keep on using Windows 7 in case you can handle their interface.
In Windows 10 users have encounter many problems.
Sugarplumms I see you are not familiar with windows and I try to explain some things that maybe help you.
Midi songs of yamaha is nothing more than any midi file you can find on internet.
The difference is that Yamaha's purchased midi songs they maybe are copy protected and of course Yamaha can create better midi files than any of us.
Every midi song(file) can play at any keyboard either is from Yamaha musicsoft or from any other source.
All keyboards also create midi files(songs) when we press the rec button.
Many of the songs you can hear at this section are created first as midi files.
https://www.psrtutorial.com/forum/index.php/board,5.0.htmlPeople choose a style+voices to play the song.
Before playing they press the rec button and when they have finished with their playing,
the keyboard automatically creates a midi song(file)
Then they convert that song from midi file(.mid) to wav file(.wav) on the keyboard using the usb audio player.
And afterwards most of them convert the wav file(.wav) into an mp3 file(.mp3) using a computer and a program is for doing that job (they are many such programs)
Moreover every computer with windows installed can play the midi songs(files) they way it plays mp3 files using the Windows Media Player(it is allready installed on your pc).
For me the best program just to watch and understand what every instrument is actually playing and the whole structure of the composition,
is by using a midi file and play it in Synthesia.
Look how Beethoven while playing the same melody over and over again,progressively adds more and more organs to give that "uplifting" feeling that modern eloctronic dance music uses so much.
https://www.youtube.com/watch?v=tdholAIjFZ8BUT for edit a midi file you must use another program like Michael's programs.