He can change his paypal address in the frontend, editing his account details (from the Accounts view)

I can't find it nowhere, see screens

is the paypal plugin installed and enabled?

Yes, see screen

the first picture you send of the "my profile" does not seem the account edit page of affiliate tracker. where did you access that?

that is the basic joomla edit profile page

the account edit page of affiliate tracker is the second image, but there is no option either

precisely.. it's not the affiliate account edit page.
when it says "dries" in your account page you should see a edit button

if you want, send me access and I'll take a look. Maybe it's just the icon that's not showing.

send you pm

Best, the css of my website whas conflicting with yours, i changed the ico class to a fa-fa icon and the problem is solved, button indeed whas invisible

Best, the css of my website whas conflicting with yours, i changed the ico class to a fa-fa icon and the problem is solved, button indeed whas invisible