Here is how you change servo parameters.
For example, assume you have already programmed one converter output to (02-01)
and you want to reverse the servo.
First go to "Xbus settings" then "servo/converter screen".
In top left of screen, select servo ID that you want to change parameters. In this case CH2-01
Then go to next page (touch > arrow on right side of screen)
Press "Reverse" then press "SET" (just above the Reverse button).
(I think that pressing the "SET" button stores and keeps the changed parameter after receiver power
is removed).
That should work.
PS: I see you are from Melbourne Aus. I am in US but orginally from Adelaide and my wife from Geelong.
I visit both places often.