Hello juanfra,
Thanks for contacting us. We do a full sweep of the forums every 24-48 hours on weekdays.
Our plugin is just an extension of EDD, and does not offer this functionality specifically. All our plugin does is attach EDD ‘tickets’ to our events.
If manually adding ‘purchasers’ is a function of EDD, then it should work just fine. I think however that you will have to use the premium plugin you are referring too. https://easydigitaldownloads.com/extensions/manual-purchases/
Does this make sense? Let me know if I can explain anything else!
Sorry for the disappointing answer. Cheers!
– Casey Driscoll