Note that sometimes this entry will contain only the changed modules. You will need the main release installed first. The best place for those is The FS modules here, when supplied without Installer once extracted need copying into the folder containing FSUIPC itself. For versions before FSUIPC6 that will be the Modules folder within your FS or P3D installation. Otherwise it will be wherever you selected at installation time -- by default your P3D Add-Ons folder in your Document