Sorry mate, but playing a song in the songbook phase will "crash" the tool because you can't save song details or add another song right after that. If you don't play or preview a song you can add new songs and save details without any issues.
Also the tool refuses to add a song that worked before due to the 256kbps thing. Even converting the song again won't change that
But there's a way to fix that. Convert all the songs that the tool refuses to add to the songbook into wav and then back into the 256kbps mp3 format
Cool cheers mate will try and fix that