You may need to reset your download for the original Carrara 7, which should give you the new programs to download (plus all the content from the previous download; I got 43 files to download when it came out).

I've never had to reset my downloads, but DAZ gives this as the procedure:

Quote - If you run out of download attempts, you will need to reset your downloads. You can reset your downloads by Logging In to your Account Page, and clicking on 'Itemized Order History.' Scroll down until you see the items you wish to download. Click the Reset Button to the right of the item. Your downloads will be reset shortly. You are allowed 3 resets per product per 3 month period.