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Connect your daughter's iPad to your Computer and open iTunes. Right Click on your iPad under Devices column in iTunes and select "Restore From Backup" from the popup menu. Select your daughter's iPad's backup point from the list that is prior to the update date and click Restore. That should restore all original contents back to your daugther's iPad.
Let me know if that didn't worked, so we continue troubleshooting. Don't Rate my answer until you are 100% satisfied.