USERNAME CHANGES: Yes, you can change your username.
Login to your account
Settings > Profile > Edit Profile
Change your username
* Remember: Username must not contain any spaces. :)
EMAIL UPDATE or CHANGE: Unfortunately, you will need to contact the site admin for an email change. If it is not possible, you can simply start a new account with the new email address of your choice.
Logout of your old account
Signup as New Member
Use the New Email and Password (or automatically signin with Facebook or Google)