ArchiStair works just like all the other Cigraph plug-in:
each unlock code works only with that ArchiCAD dongle (the dongle used to serialize the add-on).
That means if you have more ArchiCAD licenses (more dongle) you need one Registration ID for each dongle.
Of course the network dongle needs only one Registration ID: it doesn't matter how many licenses it handles.
The good news is that the second sites of ArchiStair cost just like the first one: nothing, also them are free of charge!
Of course, each distributors/resellers could decide to ask you some money for additional shipment cost...
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Fabrizio
Fabrizio Diodati
Graphisoft Italy Srl | Via Rossignago 2/A Spinea Venezia 30038 Italy