When you enter the Settings on the left hand menu, the first screen you will be taken to is My Profile. This is where you can edit all the information relating to the owner of the account. The information provided in My Profile will also be used to create an email signature for your send outs. It is recommended to upload a profile picture as it will also be included in your email signature and add a friendly face to your send outs.
In addition to your your contact information, you can also change the App Mode and your Password within My Profile. The App Mode you choose will determine the interface you see when logged in. Choose from Sales or Business. Your Password can be changed after you enter your old one and confirm the new one.