How do i "save" the livery I chose? Each time I open XP 10 the generic model appears. What am I not doing?
Liveries in v10 don't work the same as in v9. You cannot "save" a default livery in PlaneMaker 10 and expect it to always load in v10. You'll just always have to remember to choose the livery you wish to fly in when you open the menu for the plane you're wanting to fly.
Since X-Plane 10.30, one can assign keyboard shortcuts to change liveries. Also, changing liveries has become available in the "Options" pop-up window (which you can call up by clicking on the "O" tab to the left of your X-plane screen).