Took my first cross country with iFly700 last weekend.  As I approached Seattle class B airspace ( I was actually above it), a huge advisory panel appeared with 2 options:  INHIBIT or ACKNOWLEDGE.  Under 'inhibit' there are several options, including 'for entire flight'.  I selected this one, but as soon as I came to another 'zone' of the class B, the big panel appeared again.  I finally just used the 'acknowledge' option as there were fewer buttons to push, but had to do it 4 or 5 times crossing the entire class B.
Any ideas on how to really 'inhibit for entire flight' ?