Lately I've noticed that CCleaner isn't quite cleaning Chrome. If I've an open session in a site or even in Chrome itself, after closing the browser and hit CCleaner, although the warning says that Chrome has been cleaned, all the seesions are still open. I have Goggle Chrome v65.0.3325.181 (64 bits) running on Windows 10 Home 64 bits and CCleaner Professional Edition v5.41.6446 64 bits.