How to downgrade from trial to the free licence

How to downgrade from trial to the free licence

Hi! I'm trying out Zoho CRM but all I need is to see if the FREE version (the one with limited features and limited to 10 users) is enough for me, but after signing in I now have the Entreprise version in a 15 days trial. I really don't want to work in features that I will probably wont have when the trial is over but I can't find any way to get out of the trial and downgrade to the free licence. Can anyone help me? Tnks!