On his support forum here at simFlight, FSUIPC developer Pete Dowson has announced the release of version 4.923 of the package – which stands for Flight Simulator Universal Interface Protocol, as someone asked – including support for the release version of Lockheed-Martin Prepar3D version 2 amongst the new features.
The new version comes as a new full installer, because of the additional simulator support and is available either from Pete’s forum post here or the download page at schiratti.com here. Due to the frequency with which features are added to and bugs are corrected from FSUIPC, if you have it installed it is always worth updatng to the latest version, whether or not you are using P3Dv2. The forum post above is always the best place to check for the current supported version. If you need a license for FSUIPC, that is available here.