This new version now has a total of 16 stereo output buses in the instrument version which should satisfy all requirements regarding multibus synth plugins like Kontakt, etc. In addition, Metaplugin now uses 64-bit internal processing if your DAW supports this (VST/VST3/AAX only, AU might come later at some point). Just like for IIEQPro recently, RTAS has been discontinued for Metaplugin, due to the increasingly impossible task to provide the necessary backwards compatibility (mainly in the quickly evolving OS X environment). The previous 3.1.5 version will be kept available.
The new version features a sweep function in the "Harmonics" section for analysis of both the fundamental response and the THD as a function of frequency (giving more insight into the nonlinear behaviour of a plugin), and a waveshaping analysis tool in the "Oscillator" section. A few stability issues have also been ironed out. Already added in the previous update: scrolling and zooming using your mouse wheel (+Ctrl for zooming).