I realize this is a process to learn. I follow the FAQ instructions and successfully install the navdata which came with b747 v2.1 (windows 10); however, when restart x-plane 11.4 and I go to dep/arr and set departure runway nothing I do can make any sids appear. I am able to easily do this with about 4 other jet liners each with slightly different fmcs... When I watch a utube showing how to add flight plan the sids are easily selectable but here no dice.
Another issue which blocks just learning aircraft without a flight plan is that my mapped heading up heading down controls which function in every other aircraft in Xplane fail. The cursor just stays in single position and is not moveable.
Basically something is fundamentally not right in the installation.
Any guidance appreciated.