Go to your avatar image in the bottom left of the screen once logged in
From the drop down menu, choose 'Settings'
Here you can update your personal details like email address, log in password and change your account type from Project to Pro or back again
How to change your Loops account password
From the Edit Profile page, select 'Change password' from the menu on the left
Enter your current password that you wish to change
Enter your new password and click 'Change password' to save