If it starts backwards, get behind the plane quickly, hold it so it does not push backwards, and quickly open then close the throttle. It will most likely switch over to rotating correctly. (by quickly I mean don't try to hold the throttle open, and don't have to open it much, just quickly open it to about a quarter throttle and just as quickly, back to idle. If it stays backwards, try it again. Once or twice. You will get the hang of it. All of my AX's do that.

CGr.