FSRealWX 3.0 changes Aircraft.CFG files

It is not necessary to import aircraft.
This is only necessary if you want to create a flight plan and then import it back into FS. e.g. for Airbus / PMDG. You can also set the fuel and load via FSrealWX.
In the Aircraft Editor you will find the menu "Load Data from FS" -> "Load from File".

Import aircraft or enter data and then save.
Then open the "Aircraft Assign" window and load the config. Then assign the current aircraft.
So you only need one config for different liverys of the same aircraft.

I will continue to expand the manual.

OK so what am I missing here? Did you leave out a step?

The first and second steps were correct.

With "Assign Aircraft" you have to be connected to the SIM and stand with your aircraft at an airport so that FSrealWX can read out the current aircraft name. The aircraft name is shown in the title. Then click on "Assign".

1. Connect FSrealWX with your Sim, and stand with your aircraft at an airport.
 
2. add you config
3. assign aircraft
 
4. save 
5. restart FSrealWX 
6. connct FSrealWX with your Sim