I was having issues with store content not showing up in my game so I did a clean install of The Sims 3 and installed my store content first before installing custom content from TSR, etc. I installed all worlds one by one, then all collection sets one by one, I installed lots in twos, and I installed individual items, clothing items, and hairstyles in fours. I still am having trouble with my store content showing up in game. I'm not sure what else to do.

I think I fixed the problem by installing cc cleaner and fixing all issues and deleting registries and I also restarted EA and cleared EA cache. Then repaired game. And now my store content is showing up in my downloads again.