What probably happened (it happened to me several times) is that the update process didn‘t find the location of your official folder. The sim doesn‘t use the windows registry to look after these things so if there is something not going on as it expects it suggests you the default path to install the content. I assume that it downloaded the sim again into the default path and now you have the official content twice. Always (!) check the installation path on the update screen and make sure it‘s the path to your official and community folder.