I don't think you sent me the right link because everything in there is about Mozilla based browsers, not Chromium. Not even "CustomLocation" exist in ccleaner.ini
Do you mean that the "Chrome" section in CCleaner (both for app cleaning in the main cleaning section and in settings for saving cookies) is responsible for both Chrome and Brave at the same time and I can't clean each of them, separately? Does it work out of the box CCleaner + winapp2.ini then or do I need to make some changes?