Hi,
I have no doubts that as an advanced user, there are workarounds to garner a similar functionality. However, I do believe that these are, by definition, workarounds, and not suitable for the average user. My suggestion would open up this kind of advanced functionality to the masses, which if we subscribe to the "don't make me think" UI mentality is exactly the kind of innovation that people look for. People want software that Just Works; the average user is intimidated by options, especially when they aren't familiar with the terminology. Some might argue whether ignorant users should use a tool such as CCleaner in the first place, but why should they be excluded from the benefits because of this? In my opinion, CCleaner should ship with new PCs and deserves to be as ubiquitous as Firefox, antivirus or iTunes in terms of the software people choose to install. Why make it more difficult than it needs to be?
Dave