If you'd prefer not to have to type in digit.squirrelstreet.com every time you login, you can set the Digit UI as default! Here's how.
1) Login via digit.squirrelstreet.com
2) Access the Settings menu by clicking on your user name to the top right of the screen
3) You can set your default UI from the User Settings
Note that this action is reversible too - you can set the old interface as default by performing the same actions.
Note also that these changes will only apply to you as the user - if there are other users for this account and they'd like to set Digit as their own defaults, they'll have to login and perform these actions too.