So after a lot of dicking around I unlocked the runes puzzle. But after all that, it seems that whenever you open the library, you have to go through it all again to unlock the instruments. I'm not solving puzzles every time I open a project, sorry....so I won't be using these on a tune
Come on Embertone, I "participated" and jumped through all the hoops. Why not just keep the instruments unlocked? It's just not cricket.
EDIT: Apparently you have to save over the instrument when you've unlocked the puzzles, otherwise you have to do it all again every time. Hmmmph!