It's the weekend and therefore probably no technicians around so here's hoping we can get it working for you. Try downloading MCPR again, save it to your desktop, right-click it and select properties and click Unblock/Apply/OK if blocked. Make sure you are signed in as a user with Administrative rights and run it and reboot immediately afterwards.
The go to your account page and download the setup file and try again.
Do you have other security software installed that may interfere with it?
By the way I just checked and the UK Technical Support Chat line is open 24/7 - check the link under Useful Links at the top of this page. They could probably assist you better than I.