Sims 3 World Adventures Installation Problems

Hi, guys. I do apologize because I'm pretty sure this is an existing thread, but I'm new to the community and am just really looking for an answer to my problem. I downloaded and installed the base game (also through games4theworld) and have been playing it flawlessly for about a week. I decided to update to world adventures. Everything is peachy until the "Crack 3" patching process. As soon as I start the first patch, I get an "Invalid file found. " error.

Any help is greatly appreciated as this is my 4th attempt installing through this process.