If you have a Time Machine backup of your drive, then the previous version will be on that.
The Mac App Store will give the date of the latest update: restore a version from earlier than that.
Can I get older (recent) versions of Keynote?
If you have a Time Machine backup of your drive, then the previous version will be on that.
The Mac App Store will give the date of the latest update: restore a version from earlier than that.