Default Master Page Set Lost

Dear All - I may have done a foolish thing, but I edited the First Master Page of the Default Full Score Master Page Set to apply to a layout. Now I want to do the same thing to a different layout in the same project but as I can only create a new Master Page Set from an existing one, I can only create a new Full Score Master Page Set from the one that I’ve already edited. Is there any way to add a new Master Page Set based on the original default, or is my only option to start again with a new project? Any help much appreciated…

You’ll need to start from a new project. Or you could simultaneously open a new project, and use the info from the correct master page to retrofit yours.

Thanks Dan