P3Dv2. At the moment it's unclear how soon Orbx will start releasing native Prepar3D v2 installers for their scenery. To my knowledge only FTX Global currently has a triple installer available for FSX/P3Dv1/P3Dv2. Some developers, such as FS Dreamteam and Flightbeam Studios for example, have been quick to update their installers, but with Orbx's extensive scenery catalogue it's surely going to take a bit of time. On top of this, I've noticed some scenery issues with tarmac covering aircraft shadows for example, so Orbx is probably going to be trying to fix these issues before rolling out Prepar3D v2 installers.
A lot of you may be struggling to install all your precious Orbx scenery into Prepar3D v2. Until Orbx updates all the installers, the following guide is a surefire workaround that should work on all current Orbx add-ons that have dual FSX/P3Dv1 installers and will allow you to install them directly into Prepar3D v2 along with an automatic scenery.cfg update.