[xubuntu] Cancell MATLAB installation

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http://ubuntuforums.org – Hello, I stupidly decided to install MATLAB from the software center without appreciating fully what it was. Evey time I try to install something new or update any existing software, it asks be to declare the exe path, which i'm almost certain doesn't exist. Is there a way to get (Xubuntu 12.10) to just forget I ever wanted to install it? (Hardware)