Hi Ben78530:
If you want to go back to using CCleaner v6.39 see nukecad’s 08-Oct-2025 instructions at How to Roll Back from v7 to v6.39. Be sure to include Step # 4 (turn off automatic updating) and Step # 5 (delete CCupdate.exe) to prevent an automatic upgrade back to CCleaner 7. Those instructions will not uninstall CCleaner 7 from your system so you will have to do that yourself at Control Panel | Programs | Programs and Features or Settings | Apps, and any custom settings you made in CCleaner 7 will be lost during this process.
You might find some helpful suggestions in my 04-Sep-2025 post in suej’s Lost bookmarks if CCleaner v7.x deleted or locked your Firefox bookmarks.
Dell Inspiron 15 5584 * 64-bit Win 10 Pro v22H2 build 19045.6575 * Firefox v145.0.0 * Microsoft Defender v4.18.25100.9008-1.1.25100.9002 * Malwarebytes Premium v5.4.4.225-145.0.5428 * Macrium Reflect Free v8.0.7783 * CCleaner Free Portable v6.39.11548 * HDCleaner Portable 64-Bit v2.091