"Atahualpa theme options" link missing from Site admin page

This is most probably a stupid question, but...

I'm using Atahualpa 3.5.1, and I don't have any link to "Atahualpa Theme Options" anymore under the Appearance section on the site admin page. It worked fine with the previous version of Atahualpa (don't remember which version that was, 3.4.x... something).

I'm using a service provider that installs the theme for me, and I have ofc contacted them. I just thought I'd ask here too, in case someone here can point me in the right direction.

Cheers,
MartinF