Hi Grégoire.
To get support, you’ll need to use our new Event Tickets (ET) plugin and its paid add-on Event Tickets Plus (ET+). Everyone with a legacy “tickets” plugin (e.g. WooTickets, EDD Tickets) should already have a copy of Event Tickets Plus in their account (I checked and you do). You can read more at Moving to Event Tickets Plus.
I cannot confirm if a certain WooCommerce extension works with ET+, but the code base for WooCommerce Tickets was essentially ported over so it’s definitely worth a shot.
Please review these links, try out ET+, and let me know if you have any follow-up questions.
Thanks!