activation fse-pro limited

Hello team, Our cycle club bought a license elevatebiz pro and use-pro. Our website: toerfietsleusden.nl has a sub domain: routes.toerfietsleusden.nl. I made this sub-domain to keep the content organized. The sub domain still has the old theme traveler-pro. Now I want to use elevatebizz pro for the sub domain, but I cannot start use-pro, because I cannot activate the license, because the number of used sites has exceeded, but it is the same domain. Is it possible to use use-pro on the subdomain anyway? Kind regards Hans Hagmeijer