With FSDreamteam, uninstall everything you own by FSDreamteam. When it asks if you want to remove the Add-on Manager, select yes. Then run one of the FSDreamteam installers, and it'll ask where you want to install your product. Select the location and install it. Run the remaining installers, and it'll install in that location. If you already have installers for the sceneries, you can just use that since it's going to run the updater anyway. As far as I know, FlightBeam scenery automatically installs in your P3D folder.