Log into your Back Office. Once you have logged in you will land on your Dashboard, 
1. click on the down arrow next to your name at the top left-hand corner. 
The drop down menu will have a "profile" tab. 
2. Click on the word profile. 
This will navigate you to your profile page. 
3. Once you see your profile page, scroll down where you will see Password. Click on the right hand side icon to "edit". There you will be able to Change Password and Save.