Here is a fix for P3Dv4 (Update 17. Sep 2017):   To use Austrian Pro HD in P3Dv4 there are the sceneryfiles itself required and some autogendefinitions.   1. Autogendefinitions: There are three possibel solutions. You can use the add-on.xml system or the autogen configuratinon merger. a. add-on.xml system: Place the content inside Documents\Prepar3D v4 Add-ons\ Austria HD Pro Autogen.rar b. autogen configuration merger: Place the content somwhere