Open SDC. Go to the Games tab. After a moment or two, it should show a list of games available for download. Highlight TA, and a download button should show. Click this, and off you go. Note that there may be more than one module to download. (At work now, so I can't see if TA is being handled any differently). There could be a movie module, multimedia, etc. You will want to download all of these. Also, make sure that you UNtick 'show pre-release versions'. It is also a good idea to tick the archive function, just in case you ever want to return to this version in future. Good luck, and good gaming.