Missing All Standard Assets

I just installed Unity Pro and find out that there are
no single standard asset.
At home I have the Personal Edition and all standard assets like “Effects”, “Enviroment”, “Character” and “Vehicle”.
But here only the “Custom Package…” entry is present.

You can download the Standard Assets From the Asset Store too

You mean the Unity Technologies Standard Assets. Of course. Thanks.
But this is still weird. The Import Package list is still empty.
I installed the same components.

Is there a way to repair the Import Package list? Maybe it’s only a path parameter or I have to copy the package in a folder.