No need to disable/delete (deleting ur app would delete all of ur data - refer here http://code.google.com/appengine/kb/adminconsole.html#delete_app)
Please add ur new email-id as an Administrator and after activating the same, delete the old administrator from ur application To add new admin, go here (GAE Dashboard --> Administration Link --> Permissions) Thereafter delete old admin using above link Cheers ! -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.