To Quote Steve from another RTMM forum post: "There were several issues with the newest version of SIRP. For the time being you can get an older version here that should work for you.https://www.dropbox.com/s/cp1hxsdwb4umo6p/SIRP_FSX_P3D_AddOn_v2.0.zip?dl=0Steve" (Forum post links for reference below): http://forum.mistymoorings.com/index.php?topic=3904.45 http://forum.mistymoorings.com/index.php?topic=3984.0