I did this several times this afternoon and followed with reboots of the whole system, but to no avail. The Mooney was similarly affected. Strangely, the Arrow was downloaded straight after the main update and worked well for that session. More work to do here and will report back if anything of note is found tomorrow.
24 hrs later… Fixed. A new instance of the 430/530 Mod has done the trick, or so it seems at this point.