The Spine Trial doesn't allow you to enter the activation code your boss sent you as the Spine Trial and full versions of Spine (Essential, Professional, Education, Enterprise) are separate applications. Ask your boss for the full Spine license page link; if they entered their email address when purchasing your license for you, they should have received the link to that page in an email from us.
From the Spine license page, you can download the Spine Launcher and enter the activation code that's on your Spine license page.
We'll also happily help you change the name and/or email address associated with your Spine license if we receive an email from the current email address on file requesting the change and informing us what the name and/or email address should be updated to.