Just installed the build 617 hoping the new vst 1.11.11 will bring a smile but it did not. In Pro tools, it only displays partial GUI and also freezes almost after its initiated.

My Thoughts:
vst is a proven and common technology since many years now. And I have seen vst2 and vst3 both 32 and 64 bit offered by vendors, some even free, and they all work flawlessly in my experience in a various Daws.

My Query:
Is there something very special or complex that Biab internally does in its vst that makes it so difficult for their vst to be perfected ?

The Plugin runs bbw4.exe silently in the background that does all the work and it needs to communicate with the exe, so it's not all internal with the plugin.