Select Account in the backstage to manage your account and sign in with your Trimble Identity (TID), etc.
The functions include:
Create Trimble ID - Learn more about Trimble Identity and how to create your own TID.
Sign In - Click this and use your TID credentials to get signed in to all things Quadri!
Find it here:
When you are signed in, you will see your license status, license system, and user information.