In the previous versions of the Sonitus plug-in's, you accessed the presets from the dropdown window in the upper left corner. The newer versions now have a "Presets"
button on the right hand side. Sorry, I'm not at my DAW so I can't post a pic.
I thought my presets were gone too when I first updated to SPLAT, but then I saw the Presets button, and voila! There they were.
If the presets aren't in that button, then there's definitely something else going on......
~J