what i tried was this:
1st- make a copy of your my documents/EAgames/downloads folder and place it, dunno, in your desktop
2- run the sims body shop. once it opens , close it.
3-you`ll see a new Downloads folder under my documents/ eagames....
4-copy your archives from the old download folder ( the one u had sitting on the deskyop) into the new one

It worked for me.

try that and tell me if it works . Good luck