lost a game,says its there but isn't

I recently upgraded to 9.10 and somehow lost a game, when I go to the free software downloads and try adding it on it tells me I already have it but I don't . It's listed and when I click on gnometris the little swirly thing goes for a bit then stops and is just back to pointer. I seem to have the rest of the games. I was going to try to remove it then reload but it says I will remove all other gnome games as well. Do I just remove them all and add back what I want? I want gnometris back, help!