Box For Salesforce / Box Settings / Can't access admin options

Hi!

I've installed Box for Salesforce long time ago but I haven't used it for a while.

I was trying to connect again but when I try to access Box Settings to see admin options, I don't see those options. I'm using the System Administrator account.

I removed the service account (using the Salesforce console: box.Toolkit.deleteServiceUserAssociation();) to see if I can set it up again but I can't find a way to do it. What Can I do?

This is what I see:

Is there any way to setup again the service account? 
Thanks in advance.
(I'm using last version)