HUMAN UI, about Licence Type:Proprietary

Hello,
I’m trying to learn Licence Type: Proprietary which HUMAN UI has. My goal
is to prepare a commercial grasshopper app. For my commercial grasshopper app i’m planning to also use HUMAN UI app inside my grasshopper app. Do i have this right or can i negotiate with the author about using HUMAN UI app inside my new app. I kindly request your help. Many thanks.

HumanUI is MIT license according to it’s GitHub listing:

Cheers

DK

Many thanks.