I have no idea what you are talking about. Is this app a Web browser, by chance? If so, which browser. If not, I haven't ever heard of of types of apps having cookies, so I wouldn't know what to advise. You wouldn't be thinking of preferences, would you?
thx guys and sorry for confusing question I asked. I know that only browsers web pages store cookies but I been told to clean cookies related to bittorent. Well that might be a bad suggestion.
Anyway at least I know how to clean them thru Safari now