From the Grasshopper website:
Butterfly beta release for Grasshopper and Dynamo
Posted by Mostapha Sadeghipour Roudsari on March 20, 2017
We are very excited to finally release the Butterfly plugin for both grasshopper and dynamo on this lovely first day of Spring! After several rounds of development, testing, and modification, Butterfly has finally metamorphosed to have all known major bugs fixed and is ready to be used by a larger number of people in our community.
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