FS utility developer TweakFS has added a new free tool to its growing collection.
SimSwitch is a simple tool to swap the FSX folder path record in the Windows Registry from FSX to Prepar3D and back again.
This utility can assist with installing or running FSX addons in P3D, so that the addon is pointed to the P3D folder instead of FSX. It provides a quick and safe way of switching the FSX installation folder as stored in the Windows Registry and assigning it to P3D. See the built-in Help tab or the readme.txt file for details.
Available from their Downloads Free Tools page.