After updating to GarageBand 10.1.1, all the instruments I've downloaded from MainStage 3 have disappeared from the instrument library. They still seem to be in
/Library/Application Support/GarageBand/Instrument Library/Sampler/Sampler Instruments, but they're not showing up in the list. Any projects with the instruments, however, play perfectly with them.
I'm not talking about Jam Packs here; they're still right there in the "Legacy" category. I'm talking about things like the expanded orchestral strings, world music, etc. How can I get these back?