In case you get a ZIP after download, use the built-in ZIP handling in the operating system to extract the Sims3Packs or packages from the archive(s). The downloaded files on TSR can be sims3packs, package files or zip files. Go to the Updates tab in the Game Launcher and patch your game from there.
It's absolutely important that you have the latest patch installed, otherwise you will not be able to install downloads from TSR or they won‘t behave as expected in game.
