You can edit your profile information from the web application (First name, Last name, email address, password).

From the projects list or from the participants menu on the projects home page, click on your username and select "account settings" :

Edit the "First name" and "Last name" fields directly in the pop-up.

Click on "Modify my email adress" or "Change my password" to carry out the corresponding actions. Both actions will require your password for security reasons.

Once you've modified your profile information, click on "Save modifications".