Hi Fly, welcome to SimV.
The gentleman who developed the Hornet doesn't want public contact. However the keys are easy enough.
What you have to do is configure them on your keyboard as they are not preset.
If you go into Settings you'll see an option for Configure Keyboard (or something like that), click on it, and scroll down the list to find the options, then set a key or joystick button for them

Ozzy