I am also interested in the changes in this update. As a user of old versions (not a fan of later UI changes) I'd like to know what type of risk I am at continuing to us them. I hope an admin can let us know.
I am guessing it has to do with the traffic the program sends back and forth (telemetry, etc) as I can't think what else CCleaner does network related but yeah, just guessing!
Thanks.