What is the latest version of CleanUp! and where can I download it?

The latest version of Windows CleanUp! is version 4.5.2. It can be downloaded from the CleanUp! web site at http://cleanup.stevengould.org/. The download page has a list of alternative download sites for your convenience.

If you're not sure which version of CleanUp! you have, refer to, How can I tell which version of CleanUp! I am running?