Here is a handy little guide I made to help you with installing plug ins for Rhino.

Step one:

Click on “File” and go down to properties.

Step 1

Step two:

Click on on “Plug-ins” on the left hand column (1), click “Install” and select your plug-in file (2), e.g., “EdgeSoftening.rhp”. Click “OK” (3).

Step 2

That’s all there is to it! Some plug-ins come with their own installer. Those are handy, but the regular ones that don’t are super easy to install.

Hope this helps!