I'm in transition from P3D v4.5 to P3D v5.1, but I want to hold the v4.5 installation. At this moment I have both versions of P3D active and I have already installed some add-ons voor v5.1. Untill now everything works fine at both sides. Some add-ons recognize automatically which version of P3D I'm running (i.e. littlenavmap).

But what to do with VoxATC v 7.43? Is it possible to use it for two simulators? Must I do a second install for P3D v5 and if so, is it still possible to use VoxATC for v4.5?

Excuses if anybody asked this before. I couldn't find such a thread.

VOXATC has separate installers for p3d4 and P3d5. They are independent of each other. I have both versions installed with no problems. Just remember that  each VOXATC install has its own utilities and correct indexer must be run for each sim. All the settings are independent also.

Jay, thank you very much for your early reply, instructions and experiences. Installation was a piece of cake. See you again at the next meeting of your Ministry 😁.