App to upgrade on Mac App Store with email that is not mine
I have an update of a free app on Mac App Store called "Itsy". However, i never install that app through Mac App Store or by other means! When i try to install it through Mac App Store i can't do it and Mac App Store ask me for the password of the following email " **@**.de"! This email it is not mine and i don't know how i get it! I buy my new MacBook Pro last week on an Apple Store! Anyone can tell me how i solve it? Or i should make a fresh install?
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MacBook Pro, Mac OS X (10.6.7), i7 2.7 GHz, 500 GB 5400 rpm