i have the same issue as of today as well had my key since 2014 and now im got a popaying my key is not longer valid and when i look it says unregistered. so of the software i bought the key is still working for all but ccleaner
CCleaner Professional Plus
4 Products in 1! Professional versions of CCleaner, Defraggler, Recuva and Speccy. Full feature set, software updates and priority support. Instant online delivery!
when i open the other 3 software it says there still registered to me and run just like the did the last few years ccleaner however is telling me every time i close and open it that the registaragin information you have entered is invalid please re-enter your details and i do and it tells me its invalled and if i close the program and reopen it still has my name and key saved and tells me its invalid. something is up here.