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  abk -c newsave.ab apps/

5: restore the backup

  adb restore newsave.ab

further reading:

http://nelenkov.blogspot.jp/2012/06/unpacking-android-backups.html
http://blog.shvetsov.com/2013/02/access-android-app-data-without-root.html
http://forum.xda-developers.com/showthread.php?t=2011811