Installed 1.6 , there where automation issues, installed back to 1.5, and aalto loads up just the init sound when loading a daw project (ableton 9 and Cubase 8), installed 1.6 back again and still everything has the preset sound... have tons of tracks with aaltos in them and all just load up with the init sound atm....
Mac osx yosemite
There is a bug in the 1.6.0 VST that made a bunch of default presets in ~/Music/Madrona Labs. You can either go back to 1.5, or you can delete the ~/Music/Madrona Labs presets and use the 1.6.0 AU version to convert the presets again. Your old presets are still installed and unchanged.
Sorry for the hassle, working on 1.6.1 here.