The following steps will enable you to edit your settings:  

• Click on the dropdown at the top toolbar beside your login id.

• At the drop-box select settings.

• Go to "Account Settings" at the left.
• Click on "Personal info". Here you can edit your personal details.
• You also add your card details by clicking on "Credit/ Debit Cards" on the left.

• After doing all the necessary changes click on 'Update Information' to save all the changes.

• You can change or add your profile pic by clicking on "Change Avatar" at the top right.
• Click on "Upload Image" to upload your new profile picture.

• You can change your password by clicking on "Change Password" at the top right.
• Here you have to enter your old password and add a new one.
• Click on "Change Password".