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Hi, seems it's an installation issue. Did you follow our video-tutorial?: http://www.hellothemes.com/documentation/hellomagento-documentation/
Try commenting wishlist.xml in (app/design/frontend/default/hellomagento/layout/wishlist.xml) like this: __wishlist.xml
And comment also app/design/frontend/default/hellomangento/template/wishlist folder
Let us know.-