[Solved]New version Bonita License

In my company, we use Bonitasoft Teamwork edition.
Today, I downloaded the 7.4.1 version, and after installation, it requires a new license, but we don't want to use up one more license key just for upgrade. I could not find how to upgrade to newer version in the old Bonita bpm.
Is there a way to upgrade to newer version of Bonita without generating a new license key?
Because the server is the same, it counts as one user. So, everything's ok now.