no contradiction,
"C:\Program Files\CCleaner\ccleaner.exe" /DEBUG
does not work as i have no folder 'Program Files'
but %ProgramFiles% does this for all locales
but the /debug option does not help, as there is no more information than without it.
Cleaning is not the problem
No, CCleaner is working fine, with or without /debug, it just crashes when resizing to small, but there is no difference with or without /debug, no additional information/window/text/ or something