Hello both. Sorry for the delay but I was locked out "for security reasons" viz four failed attempts to log in. But it was only last Sunday at 10:34am that I received an email acknowledgement that I had successfully changed it to the one I'd kept inputting! I 'changed' it to the same one that I'd used before. Anyway, enough of that sideshow.
I tried to download the free version from https://www.ccleaner.com/ccleaner/download - I wish I could buy the professional version but money's tight at the moment because of Covid19.
I always check for new versions of my programs (sorry I'm old - I should have said Apps!) at least once a week, but usually more frequently.
So if I install v.5.66 later today I'll have my favourite CCleaner back. Wonderful.
PS Is there a 'Mark as Answer' button here, please?
I have Windows10, v1909 build 18363.815