I think I might have cured the problem. I received some help from Arturia but most of the things they recommended I had done already such as, download and install latest updates and update the Keylab firmware, all to no avail. What I did notice on my three computers is that, the only one that worked didn't have the Keylab 61 software installed. So, I completely uninstalled everything which included entering %programdata% and %appdata% in the the adress bar in windows explorer and deleting all the Arturia folders. Then I downloaded and installed the latest version of the V collection. After doing all that, Analog Lab seemed to work fine each time that I started it up. I haven't plugged the Keylab in and tried yet it but I will later today. Watch this space.