Hi, i want to clear that the license is not fetched just opening a scene with Forest or RailClone objects, but when scene is rendered or a FP/RC object is edited.
It works in that way by design, because a license is required for each workstation, both to RENDER or EDIT FP/RC objects interactively (not for render nodes).
We know some plugins require a license only for edit, but this is not our case and we don't like that approach.
In the same way that you cannot use an unique license to edit or render from multiple computers with V-Ray (or Corona), we think it's not fair that you can do that in FP / RC.
Said that, we are evaluating possible changes to our licensing system. But this require time and be very careful to please everyone.
One change that would be relatively simple, is to free the license inmediately after editing or completing a render. That should solve many license inconvenients, as yours.
Thanks for your understanding.