Categories menu disappeared

Hi,

I don't know what I did, but suddenly the categories menu in articles disappeared.
I searched for hours, reinstalled hikashop,... but couldn't fix it.
Is this a setting I'm over seeing?

What I see:

image missing http://www.paessens.be/temp/hikashop_wrong.jpg

what I should see:
image missing http://www.paessens.be/temp/hikashop_correct.jpg

Thanks in advance!

Ok, I feel stupid now.
It is indeed a setting in the configuration.

I found it after carefully reading every option.

Yes, it'es the category explorer option of the Display tab of the configuration which handles that.