During my migration I had the old 2.4 open on my desk top next to my new 2.5. Just copied my Addon Scenery folder for 2.4 to 2.5 you will also notice that 2.5 doesn't have a modules folder, I copied that too. Before I installed 2.5, I renamed my P3d folder from D:\Prepar3D v2 to D:\Prepar3D v2.4. I then ran uninstall on D:\Prepar3D v2 and Prepar3D v2 was removed from the registry but my folder P3D v2.4 remains intact with all my files. I created a new folder D:\Prepar3D v2 and installed version 2.5 to that folder. I had previously made copies of my configuration files so I could just copy them to where they belong in the 2.5 version. I copied my Sim Objects and all other folders, Orbx, FSAddon etc. This process means that your scenery.cfg from 2.4 is still good. My system is now fully operational with the exception of Instant Scenery I am sure there are other ways to do this. Jeff did his another way and I assume that he is operational also. You need a new version of FSUIPC and ASN and both are available.