Hi again,
it´s exactly the solution, which Ian has posted. Follow exactly these steps and it will work - the reason is not a navdata issue, but more a PMDG issue in their internal processes. We have no influence on it, we can only recommend to do the following steps. When all doesn´t help - try to use the default data which are included in the setup.
We can´t do more, than do recommend these steps, sorry but that´s not a navdata issue.