Hi.
for all people interested in "odd" button models (that is 3 or 5 button models) I give you a very simple patch to implement it now. The next version will consolidate the change.
Inside the library is implemented a "logical level" where are defined all actions performed after a button push.
Those functions are private members of class menwiz, so it is necessary to make just one change to the MENWIZ.h file, moving the definition of actBTE() from private to public. That is all.
In your sketch you can implement a menu entry acting exactly as the escape button as following (example):
s2=menu.addMenu(MW_VAR,s1,F("Back")); //add a terminal node (that is "variable");
s2->addVar(MW_ACTION,&bte); //create a variable of type "action"
s2->setBehaviour(MW_ACTION_CONFIRM,false); // you don't need action confirmation to emulate Escape button!!!
EDIT:
void bte(){
menu.actBTE();
}