Ok bruv, do I need to uninstall what is currently installed on my machine before reinstalling?
For the record, I thought this 'install the update' was a matter of convenience, I didn't realize it was the only recommended way to install, or that a 'piecemeal' installation would roll back to earlier versions. Neither of those points were clear to me from previous posts, which I definitely did in fact read. And the reason I downloaded CW multiple times is that someone in this thread suggested that the problem may be a bad download.
That said, I did already install the 4.0 upgrade successfully already, it just only showed limited modules. So based on what you said, I'm wondering if all I need to do is just run the activation utility a few times?