Possible to remove license from ServiceDesk Plus?

Possible to remove license from ServiceDesk Plus?

Greetings.  We have recently started using ServiceDesk Plus with a free license.  We realized that, baring major changes within our organization, we will never need more then 5 technicians.  Prior to installing the license we had a license free version that supported 5 technicians and would not have to be renewed every year.  Since we will not need more then 5 technicians and would like to avoid the annual renewal process, is it possible to remove our free license and go back to the unlicensed free version?
Thanks!