For what it is worth, after every time I install Ccleaner, I run it to clean itself ironically heh heh. Make sure on first screen of CC "Windows" side that under "Advanced" "Custom Files And Folders" is checked to be enabled.
Options | Include
File:
C:\Program Files\CCleaner\CCleaner.exe (no need for 32 bit version on 64 bit OS)
C:\Program Files\CCleaner\CCUpdate.exe (I update everything on my systems only manually, besides beta FF or PM)
C:\Windows\System32\Tasks\CCleaner Update (self-explanatory)
C:\Windows\System32\Tasks\CCleanerSkipUAC (All my machines already have UAC disabled)
Drive or folder:
C:\Program Files\CCleaner\Lang\ (Include files, subfolder and the folder itself - I am USA native, English-speaking)
C:\Program Files\CCleaner\Setup\ (Include files, subfolder and the folder itself)