Sorry about that. You should get into the habit of saving your song in stages. That way, when something goes awry, you can load your last saved edit and carry on from there. Make sure to give each save a new filename like, mysong1, mysong 2 etc.

I use a special folder and location for my personal Biab songs as well.

Maybe one of the support staff can help out with a way to recover your song? I hoped the edit/undo would have worked for you.

Trax