trouble finding my downloaded gmes to simes 4

Do you mean your "save games" (i.e. you started playing with a household, and then saved the game and closed the program) or downloaded packs?

Save games can be found on the home screen. Open the game, then click "load game" on the home screen (under the big play button) and any saved game you have had should appear.

Downloaded packs should appear in-game once you start playing with a household / manage worlds.