For optimal performance, it is generally recommended to use the latest version available (currently in the v6.x or v7.x range) rather than older specific builds like 6.06 unless you have specific compatibility requirements. You can download the latest version directly from the official CCleaner site.
If you are looking to this specific build or need help activating a professional license, let me know. Release Notes - CCleaner ccleaner-pro-6-06-10144-full-version
Improved the accuracy and category filtering for the . For optimal performance, it is generally recommended to