Please see the Frequently Asked Questions page to see if you have a common support question that we have already answered.
Prepar3D comes with extensive help documentation entitled the Learning Center. It can be access from inside the simulation by selecting Help, Learning Center from the menu bar. The Prepar3D v5 Learning Center can also be accessed online by clicking here.
Finally, feel free to post on our Support Forum if you have any unanswered questions. Prepar3D developers visit and participate actively in the forums and this will ensure you get the quickest assistance.