How do I uninstall this app?

Every time I go to uninstall this app it says I cant because its open, when I go to close it it asks if I want to open it. Theres no menu, so I cant just close it through its own menu, and I cant close it from the dock because it isnt recognized as being open. I just want it gone forever and Ive had this installed less than 10 minutes.

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