Once you sign into your account you are able to change the name of your account at any time. To do so click on 'Account' at the top of your screen.
Click on 'Change Details'. This will redirect you the the page which allows you to update and change your company settings.
Under company settings you will have the opportunity to change the name of your account. Whatever name you choose in this section will appear on your accounts dashboard, meaning whenever you return to the home page of your account this will be the name that you and your users see. Once you have chosen your account nam,e click 'Save Company Details' and these changes will be immediately updated.