How do I uninstall Nixnote

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http://askubuntu.com – I downloaded and installed the 32-bit nixnote package from sourceforge. It was 1.4 version .deb package download, and when I clicked on it, software center opened, and I installed through software center. But when I tried to find it to uninstall, it is nowhere to be found in Software Center. I do I uninstall it then? (HowTos)