strange when you go to the download page TV guide for Kodi select download then select pvr stalker NFPS then you will see option Jarvis or Isengaurd make your selection, though I believe Jarvis 16 is strongly recommended the you see options,
pvr.stalker.nfps-android-arm-1.0.3.zip 19-Feb-2016 01:40 451705
pvr.stalker.nfps-android-i686-1.0.3.zip 19-Feb-2016 01:40 507508
pvr.stalker.nfps-osx64-unknown-1.0.3.zip 19-Feb-2016 01:40 290627
pvr.stalker.nfps-pi-arm-1.0.3.zip 19-Feb-2016 01:40 326517
pvr.stalker.nfps-rbpi-1.0.3.zip 19-Feb-2016 01:40 307380
pvr.stalker.nfps-win32-1.0.3.zip 19-Feb-2016 01:40 193421
Its now a simple case of selecting the correct one, save to ware you remember and install it, hope this helps.
pvr.stalker.nfps-android-arm-1.0.3.zip 19-Feb-2016 01:40 451705
pvr.stalker.nfps-android-i686-1.0.3.zip 19-Feb-2016 01:40 507508
pvr.stalker.nfps-osx64-unknown-1.0.3.zip 19-Feb-2016 01:40 290627
pvr.stalker.nfps-pi-arm-1.0.3.zip 19-Feb-2016 01:40 326517
pvr.stalker.nfps-rbpi-1.0.3.zip 19-Feb-2016 01:40 307380
pvr.stalker.nfps-win32-1.0.3.zip 19-Feb-2016 01:40 193421
Its now a simple case of selecting the correct one, save to ware you remember and install it, hope this helps.