You can change the email address associated with your account from the Profile Settings email page. Enter your new email, current password, and click Save Email. A confirmation email will be sent to the new address.
To change your password, go to the Profile Settings password page. Enter your current password and the new password twice, then click Change Password.
If you've forgotten your password, make sure you're logged out and go to https://sketchfab.com/login/reset-password. Enter the email address associated with your account and click Reset Password. A new password will be emailed to you. Please be patient as this may take several minutes to arrive. If you have any issues, please contact us.