A lot of you have bought Expansion Packs, and have it not showing up on the launcher. I have the same problem. Today, I purchased Sims 3 Pets, and it says I own it, but it didn't show up, and still stayed on the screen from when I got Generations a while back. There's no way you can fix it. A lot of people have already tried deleting it, and installing it again, and that doesn't work. I believe Steam is trying to find a way, so you're just going to have to be patient, and wait, and understand that Steam is doing the best that they can. But, I'm glad to understand that I'm not the only one having this problem. Don't un-install it, because it won't do anything. I guess if you bought Expansion Packs today, it just didn't co-operate. But, I'm sure they'll fix it as soon as they can.