How do you uninstall and then reinstall on Origin?

So I just bought Island Paradise through Origin, and while I was installing it, the installer quit. Then, when I went to install it again, the install button was gone, and it just said "play." However, when I play, it takes me to the University launcher, and Island Paradise never shows up, so I'm assuming it never actually finished installing. I'm figuring that I should uninstall and then reinstall Island Paradise, but I don't know how to to that. (If there is a better solution to this problem, please let me know!) Any help is greatly appriciated!