Maker Piriform was bought by anti-virus company Avast last year and since, users have been complaining of the product going downhill, with 'malware', advertising and other irritating stuff creeping in.
But in this latest build, things get a great deal more Machiavellian as 'active monitoring' is effectively putting spyware in your machine.
BetaNews first spotted the issue - a new telemetry setting that the Changelog describes thusly: "
CCleaner now sends a heartbeat every 12 hours which reports up-to-date usage statistics to allow for faster delivery of bug fixes and product improvements"
Waaaaaaah. So a permanent background process that's constantly telling Piriform that your computer is on, possibly more?
But that's not all. Active Monitoring, which collects even more data, is supposed to be an opt-in thing - you'd think that would be obvious after all that GDPR malarky.
But apparently, when you turn it off, it turns itself back on. Hardly optional, is it?