Hi Cindy,
Thanks for reaching out! I’m sorry that you’re running into this issue with Pro. We’ve released a few updates since your license was active, so I would first recommend updating to the current version of The Events Calendar (4.6.17). If this is causing your site to crash, then there might be a conflict with your theme or another plugin at play. You can check for this by running through the steps outlined here.
If you do opt to renew your Pro license and are still running into issues, you can reach out to us in our Pro support forum at any time – we’ll be happy to help you out there! If for some reason Pro doesn’t work out for you, we do offer full refunds within 30 days of purchase.
Regarding event registrations, you can set the start and end sale times in both Event Tickets and Event Tickets Plus. Outside of this window, users will not be able to purchase tickets.
Let me know if you have any questions!
Thanks,
Jennifer