In addition to the "subject line" problems add right-click 'Run Ccleaner' from the Taskbar and right-click "Run Cleaner" from the system tray on Windows 10 1803. I am NOT running Malwarebytes. The problem is with CC 5.44.6575. Everything works for me when I revert back to CC 5.43.xxxx.
Maybe I misspoke about the directory. I was hoping for something like what Eraser 5.85 does -- that is to overwrite the filename with ZZZZZs and change the path to C:\?\.
Seems like a good idea to me.