All VST3 versions of plugins of Plugin Alliance which I tested or own have bug which prevent to using presets in Sonar Plat. I reported this bug to them they answering they were going to work on it but quite a long no progress....
Especially considering it is probably easy to fix - it is just about displaying lists of presets in menu :-/
So if you have PA plugins I would recommend you using VST2 versions which are showing presets sometimes in strange form but they are there...