2017 commands don't show up in Animate 2020

I have some Animate CC commands that I got from a Lynda.com (now LinkedIn) tutorial. They are tween and "next keyframe" commands. I searched the Commands folder in my file explorer, confirmed that it was the Commands folder for Animate CC, and copied the commands into the file as shown in the tutorial. However, the commands are not visible to me in the Animate CC commands dropdown as they were to the instructor in the tutorial. And they are not visible when I try to assign keyboard shortcuts either.

I tried to attach one of the files to this inquiry, but it got deleted and I got a message in red from adobe that read: "correct the hilighted errors and try again. The attachment's tween shape-80.jsfl content type (application/octet-stream) does not match its file extension and has been removed."

Is there another way to do this in the updated version? Is it possible that the commands from 2017 just don't work in 2020? Has anybody else had this issue?

Any guidance is greatly appreciated. Thanks!

Update: Somebody tried to answer me, but their answer is gone now. They said: " You'll have to copy your JSFL files from the 2017 install to the 2020 install."  Is this the correct solution? And if so, how do I do that? I never had An2017. I only have An2020. The tutorial is from 2017, so I assume the commands are as well.