Plugin Updates: All updates for the first year are free. The plugin license is perpetual, but if it stops working after the first year and you need updates or support, you’ll need to purchase a renewal.
"We tested the free version of the converter 'IGES Exporter for Autodesk® Revit®' and found it to be the only one that perfectly converts formats for our machines. This convinced us to purchase a license without hesitation. "