need to update Enfold, don't have the username

Hi,

I need to update a site (trottiersymposium.org) that uses Enfold. This site is co-owned by two university institutes. Enfold was purchased by someone at the other institute that no longer work there and left without provinding us all the credentials to maintain the site.

Enfold is still at v3.71 and WordPress is at v5.0.3, I think it explains the editing issues I have. Some pages elements are simply impossible to edit…

Is there a was to recover access to get theme updates?

Thanks in advance,
Louis Beaumier
Institut de l’énergie Trottier – Polytechnique Montréal