Thanks to Phil from Apple for this solution. Keynote froze up after update. Go to settings, then general,
then usage, then manage storage. Click on keynote then click on delete app. WARNING make sure that backup is
turned on in the iCloud settings. This will save your data to the cloud. Now go to App Store and download Keynote again.
Thanks to Phil from Apple support for solving this issue for me. Hope it works for you. Backup that data first. !!!!!