I managed to find the blocked cookie in the long list and removed it from said list. I then reurned to your website, which I had not left, only to find I was still NOT being recognised. I then left the website and logged back in - VOILA!!! The license page immediately recognised me and had the software list at the bottom. I was able to get a license key and have posted it into the screenshot capture software on my PC.
Thanks heaps for your help. I will think over what you said about cookies. It is not the first time my paranoia about them has resulted in some lost time and effort. The problem really is that you do not know you are going to need a cookie until AFTER you have blocked it. It is a shame that these types of cookies are not presented for accepting or blocking at the exact time that they are required (rather than at the very instant you access a website. Perhaps there should be TWO types of cookies - one for general website needs and the other for things like registration. The second one only being presented at the required point in timer. Food for thought.