I sometimes add cookies to "Cookies to Keep". To do this for a site, I used to clean all the cookies, then get on the site, login and back to CCleaner. In CCleaner I would then copy all cookies that show up in the left pain to the right pain. But now CCleaner seems to remember old cookies so it is now very difficult to run this procedure.
I suggest, if nothing else, that CCleaner offers a method to do this.
Eddy