Yes, from the ZoneDirector CLI, there is a configuration command.
ruckus> en
ruckus# config
ruckus(config)# upnp
UPnP Service is enabled
/bin/upnp enable
ruckus(config)# no upnp
UPnP Service is disabled
/bin/upnp disable
ruckus(config)# exit
Your changes have been saved.
ruckus#