Installing CubeCell into Arduino "portable"

Has anybody any instructions about how to get the github version running with an arduino portable version?
I tried to do everything documented but changed the target directory to:

but that seems not to be enough…

Thanks in advance

Does Arduino portable have an “Arduino” folder in your document path?

This is how I create “my portable version”:
Install arduino from the arduino-provided Zip-File.
Create a portable directory within this “arduino” directory.

This is how my folder structure looks like:

So - no documents folder there…

Can you find the hardware folder in this path?