Set FW up to use a separate port than LW uses. Go to FW's menu bar, Tools>Options>Advanced>Firewalls & change the listening port. If necessary you may also need to add this whilst configuring particular firewalls. That clears the way for both FW & LW to be used simultaneously though it's wisest not to. If you had port forwarded for LW, then you'll need to do the same for FW but a different port to LW. Both can use the same port but not simultaneously or in the same computer session (this depends upon system.)