You also have to assign the aircraft config. Otherwise you have to create a separate config for each aircraft (including liveries).
Open Aircraft Editor -> Menu -> File -> Assign Aircrafts.
First, connect FSrealWX with FS
1. click "new" (2)
2. AircraftConfig appears (e.g. 3.)
3. select your config
4. click "Assign currect aircraft" (4)
5. your aircraft from (1) will be added.
6. save
7. restart FSrealWX