Good afternoon Ana and welcome to the Events Calendar forum!
Thank you for your interest in our products.
We’ll be glad to answer your questions.
We do not have a trial license program in place, but we do have a 30 day full refund policy that lets you figure out if our plugins work for you: https://theeventscalendar.com/knowledgebase/refund-policy/
We sincerely hope they do.
As a side note, you might be interested to apply to our nonprofit program that offers the Events Calendar Pro and Event Tickets Plus licenses: https://theeventscalendar.com/knowledgebase/do-you-offer-discounts-for-nonprofit-organizations/
Just to clarify, that program does not include Event Aggregator.
Hit us up if you have any questions or need help.
Have a great day!
Geoff B.