The song a lesson builds is yours to keep.
Fixed: songs from lessons. When a lesson like the 808 built a song, the song you kept had no notes of its own. After quitting SynthMaker it couldn't play, and opening another song didn't keep it in Earlier songs. Now the song keeps what the lesson played: it plays after you reopen SynthMaker, and it's kept when you open another.
Tell us what you think on Discord.