FSXaddict wrote on May 30^th, 2021 at 3:43pm:

Is this just a visual model with no working navigational systems?

Yes and no.  It IS a visual model, but with all the systems of the default Asobo 747-8.
There is no custom FMC coding for this product, nor will there be.
If you have the "Salty" mod....CS will not support it as it conflicts with their adaptation of the model.  However, another freeware modder made a mod to this mod (confused yet), as to make the plane much more flyable, since CS will not do this.

You have purchased a 777 visual model that uses all the systems in the Asobo 747-8, as the sale literature clearly states.
I hope you were not expecting more?