Here is detailed information on how to add your Toontrack product as a plug-in in Waveform.
This guide was made using the mac Waveform version 11.5.18.
Simply drag the “New Plug-in generator” onto the plug-in section of a track in the timeline. The plug-in selection list opens and you can select the Toontrack plug-in you want to add. The plug-in window will automatically open when you insert the plug-in onto a track.