I feel like I'm taking crazy pills, I've scoured the admin and went into the configuration for the add-on, but there's no area to paste my license.
All that shows is:
<label style="color: #707070; float: left; margin-left: -250px; padding: 5px 0px 0px; position: relative; text-align: right; width: 235px; word-wrap: break-word; font-family: Arial, sans-serif; font-size: 14px; line-height: 20px;">License Type</label>Atlassian OnDemand License (Inactive)