I was hoping that they were fixing the Mixbundle VST3 presets (which do not showup when using their Vst3s) in Sonar. Alas, they do not list such in the changelog.
[EDIT: I just figured out how to use presets with Softube VST3. Instead of using the pulldown preset. click on the VST3 pulldown and choose "load" and it will load presets fine. I have been slow before, but this took a couple of years for me to figure out that VST3 presets are not show in the "normal" preset window, but are under VST3 pulldown.]