Re: Sims 3 Store Worlds Locked by EA play, doesn't show in game when downloaded
@PinkPenguinnn028 I would suggest NOT buying a copy of Sims 3 from EA. The chances are that your secondhand disks won't work anymore, so you'd be stuck rebuying all your other content too.
It's possible the Store worlds aren't working because of the previously-present, now-missing EA Play copy of Sims 3. However, that's not the only possible cause of this issue. Please rename the Sims 3 folder in Documents > Electronic Arts, or move it elsewhere. Open the launcher to spawn a clean folder, and download one of your worlds. Wait two minutes after the world appears to have downloaded correctly, and only then try to install it. Launch the game to see whether the world shows up.
The issue here is that sometimes the download hasn't finished, and trying to install at that point corrupts the world. If this is your problem, then it's easy to work around—just make sure to wait a minute or two between downloading and installing a given world. You can also move your saves and any other content you'd like to keep to the new Sims 3 folder once you've installed your Store content there. Please see this post for more details:
https://answers.ea.com/t5/Store-Issues/Read-First-Sims-3-Store-guide/m-p/13479974#M1296
If this doesn't help, please claim Riverview (it's free) and see whether you can install that into another new Sims 3 folder. Let me know how it goes.