Hey there Jean-Philippe. Thanks for the note here, and for your follow-up. You should not be limited to 1 use of the widgets; are you saying that is the case? On my site I’m able to use each of the PRO widgets as many times as I see fit. Are you experiencing something different? Let me know if so and I’ll do what I can to try and troubleshoot.
If you wanted more flexibility than what the widgets can offer, you could always use template tags too. They’re detailed in some depth at https://theeventscalendar.com/support/documentation. Hope that helps and please let us know if you have any other questions.