In App Update

Ccleaner should have an in app update like how firefox or chrome did

It is a hassle to keep download new update out of the application itself

Pro (paid) version has the autoupdater.

Ccleaner should have an in app update like how firefox or chrome did

It is a hassle to keep download new update out of the application itself

That hassle keeps ccleaner free and fully functional (not hobbled or nagware or adware)

As @nodles stated, a purchase of the paid version will get you one year of in app updates.