ballscrewbob:
Project folders are not deleted unless they were placed in any of windows temporary locations.Whenever I tell anyone to use CC I always say leave at the default settings.
Are you 100% certain it was CC that did it ?EDIT
ADDITIONAL INFO
I am sure it is deleted by CCleaner. And the settings are in default, never touch it. I have several projects and the new ones are saved on separate drive. Not sure about the old project files.
I will give a try on Recuva and thanks for sharing the details.