Hi Conor,
Thank you so much! The problem with a FreeBSD version is, as always, Qt. PixInsight 1.8.5 uses Qt 5.9 and requires Qt WebEngine, which is based on the Chromium web browser. Qt 5.9, and especially QtWebEngine, were not available/compilable on FreeBSD when I released 1.8.5 at the beginning of August. I see on KDE's blog that it has been ported two days ago, so I'll give it a try.