Slitherine

I don't know if this is new or has always been.
Go to editor.
Click the save/create button (CD icon lower left)
Click the globe icon

You now have a UI to create your campaign folder, scenario folder, and text1.txt

Create your battle and save it.

Play your battle.

Of course you can add all the little details for a full blown campaign.

I had never done this before today and thought I should share.

It's always been there . You get the same little UI if there are no custom campaigns set up when you first hit Editor.

Cheers

Pip