PSPP has no undo function?

I've been using pspp a little bit so far, but when I accidentally deleted one of my cases after pressing 'clear case'and wanted to get it back, I found there was no undo button in the edit tab nor did pressing ctrl+z work. The search function on the forum seems to not be working right now so I can't search if anyone's found an answer here, and google searching hasn't helped either so far. Help is much appreciated.