Thank you for that, I follow your reasoning, but what I want is CC Professional on two additional units my phone and Tablet and the only way to get that is by going to Pro Plus. I have Pro on my PC and it does so much more to keep my PC clean, much more than basic CC Cleaner which I have on phone and Tablet, the problem is that I have paid for Pro for a year, I do not want to have to lose the reainder of this to upgrade. I can see no way that existing subscribers can upgrade by making an additioan payment.