This video explains how to modify your profile information in RunSignUp.
CORRECT TYPO/MODIFY ACCOUNT INFORMATION
If you need to change any of your account profile information (ex: your name, email, address, etcetera), then simply go to your “Profile” page, and click on the button marked “Edit” to the right of your name and Profile Picture. Note: This is also the same method for updating the information of a "Sub-Account".
On the Edit page, you can edit all of the information that you entered in when you first created the account, and change your password if necessary.
When you are finished making changes, click “Save”, and a confirmation message will let you know that the account changes have been saved.