[Freeswitch-users] mod_com_g729 - moving licences to a new server

I need to move our current pbx to a new hardware. How can I disable the g729 licences on the old server and enable them on the new one ? The current production server has an old installation of mod_com_g729: can I upgrade it to a more recent one without upgrading freeswitch ? Does mod_com_g729 upgrade need to stop running calls ? Thanks in advance Massimiliano