Yes. If you click on the top of the roller and get into the menu system, scroll down until you see Throttle Curve. Click into that and then adjust the 5 points where you want them. For sim's, I would leave normal linear (just easier. You can do something like 0 50 50 50 50 if you want though) and then set IU1 to 100 100 100 100 100.
This playlist may help you out with setting that Tx up.