I'm a free version user and have been for many years, so I can't really criticize your product without being a hypocrite, but I think you should be aware of a problem with the registry cleaning function of CCleaner. I have an Alienware Aurora R7 PC with an Nvidia 1080 video card. I used the registry cleaning function yesterday, and it created a disaster. There is now no display available either from the vid card display port or the basic computer display port. The PC is on warranty and Alienware (Dell) needs me to send them the PC to fix the problem since nothing the tech rep and I tried by phone would remedy it. It will cost me nothing, but the PC will be down for 2 weeks and since I'm an avid gamer this is very irritating. I just thought you should know that something went wrong with the registry cleaning function which could affect other users as well.
Other than this annoying problem I do wish to thank you for a great product. In 10 years this is the first time it has failed me, and I use it daily. A pretty good record actually.