I said in my post last night that WordPress was being silly about doing an update. Apparently, as part of that silliness, it reverted the changes I made to the IJP Libraries page. Please try again. It seems to be working now. The version you should be getting is titled “IJP_SODE_Simobjects_20180302.zip” – which is, indeed, also a direct link to the file in question.
Apologies for that. Again. #BlameTheComputer