Hi, you don’t need increase/decrease flaps at all.
Look at the pic Fleiding has posted.
-remove your flaps assignments completely
-find flaps axis (first line in your second picture)
-do not click search by input !
-click in the box next to “flaps axis…airplanes axis”
-move the lever on the stick - the box should display joystick axis 5 then
And that’s it! From now on you can move the flaps by moving the lever on the stick.
Hope it’s more clear now.
Frank