Did you suddenly lose all your Waves IR-1 presets one day? Yeah, that happened to me too. Remember the directories /Applications/Waves/Plug-Ins V9/IR1Impulses and /Applications/Waves/Plug-Ins V9/IR1Impulses V2? They've now moved to /Applications/Waves/Data/IR1Impulses and /Applications/Waves/Data/IR1Impulses V2. Move the library's preset subdirectories across too, to match the built-in preset subdirectories, and you'll be able to see them in IR-1's load menu again.