Skinny Kid

I'm sorry to confirm, but the issue with CCleaner Pro v. 1.18.30 "Run CCleaner" option (dropdown menu) still does not work on Big Sur Version 11.1. This has been a persistent issue across all versions of macOS Big Sur. I have been running Avast Premium Security for Mac across macOS Mojave, macOS Catalina and macOS Big Sur. It is only under Big Sur that the CCleaner dropdown menu option is non-functional. I am running a clean install of macOS Big Sur, and security settings remain the same in Big Sur as they have in Mojave and Catalina (Firewall On, Stealth Mode enabled), and CCleaner v 1.18.30 has full disk access. I have a 2017 15" MacBook Pro, 3.1 GHz Quad-Core Intel Core i7, 16 GB RAM. Any help would be appreciated.