@Gerry and Jeff.
Thank you very much for your answers.
I followed the correct route with the installation, but also got an answer from Alvin(RL).
For me it's a big puzzle.
Here is my answer to Alvin.
@Alvin(RL)
Many thanks for the answer.
I followed the instructions in the link.
-right click on the pack and choose move location

-click Default
And here is a problem. When I choose Default the path is: D:/Bestanden/Reallusion-iClone7/Template/iClone 7 Template/iClone Template and not C:/Users/Public/Documents/Reallusion/Template/iClone 7 Template/iClone Template.
When I installed iClone (years ago) I could choose the location for the Template and Custom content .
I have tried to make a new folder on my C disk for the default location.

But that isn't possible, because the structure is different.
It should be C:/Users/Public/Documents but on my PC the structure is C:/Users/Public/
Public Documents. And there is alreay a folder Reallusion(see picture above).
So I thought I make a new folder C:/Users/Public/Documents/Reallusion/Template/iClone 7 Template/iClone Template.
I have moved the content to this location. I saw the content was on the location (find file) and I also saw that on my D disk were shortcuts in the iClone folders were the content was installed before .
But when I tried to generate a terrain the pictures and plane could not be found.
Maybe I made a mistake. I hope you can help me.
Best Regards,
Arie