How to switch app's Apple ID?
So a few months ago I sold a MacBook Pro that I no longer needed but I left a few apps on there that I had downloaded from my Apple ID account. I got an email today from the man I sold it from asking me how he could update the apps and what the password to my account was. I really do not want to give him the password to my iTunes account because it has thousands of dollars in apps and music and I do not want him to purchase anything on my account. Is there any way that I can have the apps updated without an account? If there is not, how can he keep the apps on the computer/ transfer them to his account? Any help would be appreciated. Thanks
Update: I at least want to disassociate my account from those apps because I am not going to give my Apple ID to a complete stranger.
Is this a good question?