Most of the functions of the windows including tables (fencers, teams, referees) are the same : see the help about tables
Engarde enables to enter several countries for a the same referee (up to 4).
It is also possible to group referees in two groups: so you can enter in the group field: A, B or nothing
The Allocation of referees can be accessed through the button "Pistes - Referees" of the "Poules" or "Tableaux" window depending on the current step of the compétition.
You can look at the help about the allocation of referees