Using Joystick instead of RC

I am trying to use a Joystick instead of a RC, we could configure the Joystick but every time we start the boat the Joystick configuration is lost and I have to setup it again. There is any way we can save the Pixhawk to only use Joystick and not RC? Can we save the configuration od the Joystick so I do not need to repeat it every time I turn the device on?

Look here:

I also have looked in a post a few months ago in this group that indicates there is a bug and I need to work with th beta version. Is that correct? I will install beta version and see if this will fix the problem.

As I am working with boat, there is any procedure to not even have the RC?

Thanks so far for the help.