'Application has changed since the last time you used it' problem

Every time I start CCleaner I get a warning 'Ccleaner has changed since the last time you used it. Do you want to allow it to access the network?' and two options Yes and No. There's no option 'remember the answer and don't ask again'.
I added the app rule manually and still get these pop-ups.
How do I get rid of them without disabling the whole program monitoring feature?