Hey Jeff!
Thanks for your interest in our plugins. I’m sorry to say that we don’t have any such “trial” feature at this time—the best we have is our thirty-day no-questions-asked refund policy, which many folks use as a simulacrum for a trial period.
That policy means that within thirty days from your date of purchase, you can request a refund any time using the steps here → https://theeventscalendar.com/knowledgebase/refund-policy/. We will then issue a full refund immediately.
I hope this helps!
George