Good evening Baptiste and welcome to the Events Calendar forum!
Absolutely, there are updates since that thread.
We have begun a working relationship with the folks from WPML.
The good news is that this means that if all goes well, we will have full the Events Calendar Pro support by the end of this month (including recurring events).
Our next item on that list is Event Tickets Plus. In fact, I am working on that very project with our Dev team.
It is still in it’s early stages, but we are hoping to be able to offer support for Event Tickets Plus with WPML this fall.
The good news is you are fully entitled to a refund if you want one since you are within 30 days of your purchase. To obtain the refund, you just need to follow the procedure described here.
So, in the end, it is totally up to you. But I can tell you that we are truly committed to making this happen.
Best regards,
Geoff B.