I bought the iClone + CC3 pipeline package with the Headshot plugin back in 2021.

I've used it several times. Last time was a few weeks ago.
I tried to use it today and I can't find it inside of CC3.

After researching, I decide to install it again.
I'm surprised to find that it's no longer installed.
But now I can't get it to install. I have a serial number for it but nowhere to input it.