Affiliate sign up

Hi Team,

1 user signed up for a pro user by paypal. The website upgrades. So that works fine.

The only thing is: the user signed up by an affiliate link, but the affiliate doesn't get their commission.

- Maybe because I didn't activate the "Supporter add-on by Barry (Incsub)" in het Network Admin?
- How can I assign the new user to the affiliate, so the affiliate get their commission for now and for the next years.. ?

Thank you in advance. Stijn