ok so i downloaded a world

I downloaded Sunlit tides and when i installed it it said it went through and said it installed but when i got in game it didnt show up i had downloaded a custom world and noticed it added a file that was titled the same as my custom world in installed worlds but with sulit tides it did not add it to the installed worlds folder now i wanna know what could be causing this and how i can fix this and please dont tell me to reinstall my game because it took me a long time to get it updated -.-

I don't know what to tell you. Sorry I would uninstall it but you don't want to. I would probably download it again Go on the forums on thesims3

If that does not help you then... I don't know what to tell you. Sorry

If it was not the official Sims Sunlit Tides World, meaning you did not pay for it but it was claiming to be the same world, it was probably bad content and is messing with your game, you need to remove it.