Gb Au Modules, Why do they dissapear? Options

[Sasha3]

I have a number of plugins for GB all installed correctly in home Library/Audio/Plugins/Components and they once all appeared in the AU Modules list in the Generator menu. Then a few would vanish even though they were in the Software Instrument list-all of this in Track Info-only to reappear a short while later or after a restart or a blood sacrifice to Cthulhu. This is weird and I can't discern any pattern to it so as to track down the cause. Oh good, as I was writing this Crystal just popped back home...oh wait, Buzzer2 left town. Most annoying.