Hi. Bad news. I downloaded last version (it's has 23 files). I "erased" the entire iClone 7.73 and installed again to ensure a clean installation. I followed step by step again your videos, and recorded the screen to see what's happen. And I noticed an error (picture attached) "Getting requirements to build wheel... error" etc. The rest seems to be ok, loaded correctly.
I did the installation twice and that happened twice.
I give permissions to scripts and site-packages folders
And reduce Idle load is un-check.
I don't know what else to do.