I recently had a little experiment where I renamed my Sims 3 folder and start a new one. Then I downloaded fresh store content from my Purchase History and also from the Store site.
I found it all installed. (I have patch 1.67)
However, previously the Store patch downloaded and was found in a ContentPatch folder inside The Sims 3 folder in My Documents.
I discovered the ContentPatch folder was indeed in my Sims 3 folder, but it was empty.
This occurred after the latest update to the Sims 3 site.
My content all installed correctly.
I also installed some backed up store content and had no problems. It was content I had downloaded and saved on an external drive a long time ago. I expected it to fail to install due to the lack of store content patches.
I'm wondering if you are now having problems because maybe your ContentPatch folder is empty? I don't know if this is related to your problem but thought I'd mention it just in case.
