Well, that’s not good news .
It is a multitrack file format containing layered stock music. I was developing that plugin in order to have a fast and convenient way to preview and import those files into projects (instead of going through an inconvenient hoop involving an external tool). I actually wanted to develop an import plugin for Nuendo, so I could directly import those files into Nuendo while selecting the layers to import. But the required SDK is not publicly available.
And now even the WaveLab option is gone. I’m a Steinberg user almost as long as I’m a professional software developer, and thus I’d really like to have the option to develop a plugin in case there is the need for something special the tools do not handle. Especially as the required plugin interfaces are already existing for both Nuendo (project filter & audio file handler) and WaveLab (FIO).