Hello Alex,
Thanks for using the Events Calendar.
Here on the pre-sales forum, I’m afraid we do not provide technical support. I would ask that you take any technical support questions across to our wordpress.org forum – our staff scan it periodically and other community members may also be able to help out as well.
If you / your client purchased our premium plugin(s) through a different user account, please login to that account and then post in one of the paid forums. Our dedicated support team will be waiting for your inquiries.
Thank you for your understanding.
Andras