You first need to load the python script "main.py" from the "Hand_Gestures_Puppeteering_v2.0" folder via "Script" menu --> "Load Python" and then you will find it under "Plugins" menu --> "Python Samples" --> "Hand Gestures Puppeteering".
BTW: I think the iClone > Plug-in > General > General Plug-in is a file path. The menu tab in iClone is called "Plugins" not "Plug-in". On my system, the puppeteering folder is in a python folder. However, since I installed it three years ago, I don't remember if it was saved there automatically or if I put it there.
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