That ‘disappearing menu items after a fee hours’ sounds as if something is shutting down the CCleaner service.
CC7 runs as a “Windows Service” and we have seen in the past that if the service is not running only the first two lines of the menu show.
The developers know about it and are apparently working on a fix
Do you have any other cleaner or optimiser that may be closing the CCleaner service?
Or perhaps you have an AV/malware scanner that may be doing it?
If you have one other than the built in Windows Defender then check it’s logs to see if it is stopping CClesner service.
@Nergal you are more familiar with this ‘stopped service’ issue than I am, any suggestions?