At this time, its not possible to change the email associated with your user account.
However, there is a simple workaround you can follow to make the switch, by creating a new account and deleting the old one:
Go to the relevant project/ team folder and send an invite to your new email address
Follow the prompts provided via email to set up the new account
Remove the old user account which used your old email
Make sure you log out of all devices and log back in using your new email
Note: If you don't have permission to invite or remove users, you will need to ask your Dashpivot admin for assistance.