Re: Sims 3 Store Worlds not showing up in game
@emmagr11 Great, so you can install your other Exchange worlds into this folder too. (They are third-party worlds from the Exchange, right, not EA store worlds? Because store worlds need an extra step to add them to your existing folder.) Install the worlds one at a time, test in-game, and make sure they're all loading before doing anything else.
If you'd like to add these worlds to your existing content, it's simple enough. Rename the Sims 3 folder in Documents\Electronic Arts, the one that your worlds are in, to something else, e.g. The Sims 3 Worlds. Put the old Sims 3 folder back in Documents\Electronic Arts, open the launcher, and uninstall those same Exchange worlds. Make sure the relevant .world files in InstalledWorlds are also gone—you don't want two copies of anything in your user data folder.
Now go into DCCache inside the old Sims 3 folder, and count the number of .dbc files. They'll be labeled dcdbx.dbc, with x being a number; the files are numbered sequentially starting with zero. (Ignore the .ebc files, which are store content.) Whatever the highest number is, you're going to rename the .dbc file(s) in your Sims 3 Worlds folder in sequence. So if your main Sims 3 folder has dcdb0.dbc through dcdb4.dbc, and you have dcdb0.dbc and dcdb1.dbc in your Sims 3 Worlds folder, those two will become dcdb5.dbc and dcdb6.dbc. Then you can move them to DCCache inside your main Sims 3 folder.
Be sure to also move the .world files inside InstalledWorlds from the Sims 3 Worlds folder to the main Sims 3 folder. Everything should now show up in-game.