Is duplicate detection a new feature?

Anyone have the lowdown on the duplication detection feature. The changelog says: "Improved cleaning algorithm duplication detection." Is this a new feature? I'm not seeing any settings in the interface where it can be enabled or disabled. What if you don't want it to detect duplicates?

It means CCleaner is now better at not detecting the same file multiple times during a scan.

Oh ic, thanks Atom. :)