Hi Hmm888:
I would advise you stay with v6.39 for now while you look for another disk cleaner to replace CCleaner.
As you can see from the many complaints in this forum, CCleaner v7.x is an unmitigated disaster and is too dangerous to use in its present form. However, the unsupported CCleaner v6.39 will eventually become so outdated that you will risk damaging your Windows OS, browser(s), etc. when you run CCleaner v6.39 because your OS and/or third-party software will continue to change over time. For example, I stopped using CCleaner to clean my default Firefox browser years ago after Mozilla changed the way that Firefox stored browser extension data in the storage.sync file, and many users corrupted their Firefox browser extensions because Avast / Piriform was too slow to change the way that CCleaner was cleaning Firefox browser data - see circcc’s early warnings in their 01-Jul-2020 topic Problem with Firefox 79 [fixed in v5.70] that were ignored by Avast / Piriform until a bug fix was eventually released. Without further bug fixes CCleaner v6.39 will eventually become too dangerous to use.
Moving on to another disk cleaner was a simple decision for me. I’ve used the portable edition of CCleaner for over two decades, but the new service delivery model that Avast / Piriform has switched to for the poorly designed CCleaner v7.x (e.g., v7.x automatically loads at boot-up and can’t be turned off - see cevme’s 17-Dec-2025 CCleaner constantly running in background) means that CCleaner Portable v6.39 will be the final release for the portable build - see employee MrA’s 08-Oct-2025 post in my topic Builds Download Page Offering Outdated CCleaner Portable v6.39.
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Dell Inspiron 15 5584 * 64-bit Win 10 Pro v22H2 build 19045.6691 * Firefox v146.0.1 * Microsoft Defender v4.18.25110.6-1.1.25110.1 * Malwarebytes Premium v5.4.5.226-146.0.5441 * Macrium Reflect Free v8.0.7783 * CCleaner Free Portable v6.39.11548 * HDCleaner Portable 64-Bit v2.095