At last, it seems the bug about "Active Monitoring" is solved in last Cleaner´s version 5.46.6652. Now, it´s working fine for me Cheers!
Yes, the same problem over here on Windows 7. It´s very annoying!! :-( I'm thinking about uninstalling CCleaner until they solve it because whenever I switch on the PC, always I´ve to restart Windows session after disabling CCleaner monitoring.