My QuickInstaller (Preview/BETA) software is currently detecting CCleaner Free Portable v6.18.10824 as the latest available update and when I checked yesterday at https://www.ccleaner.com/ccleaner/builds I'm almost certain that download page was offering the v6.18.10824 installers and .zip file, but today that page is offering the previous v6.17.10746 build.
It also looks like the release notes for v6.1810824 have been removed from https://www.ccleaner.com/ccleaner/version-history even though the release announcement at https://www.ccleaner.com/knowledge/ccleaner-v6-18-10824 is currently viewable.
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<span style="font-size:11px;">Dell Inspiron 5584 * 64-bit Win 10 Pro v22H2 build 19045.3570 * Firefox v119.0.1 * Microsoft Defender v4.18.23100.2009-1.1.23100.2009 * Malwarebytes Premium v4.6.6.294-1.0.2189 * Macrium Reflect Free v8.0.7690 * QuickInstaller Preview v0.2.8719.10780 *CCleaner Freee Portable v6.17.10746</span>