How to open Wave Arts plug-in within Audition 2020

You must first open the Audio Plug-in Manager, found within the Effects menu.

Then click the Scan for Plug-ins button. After scanning you should see your recently installed VST3 plug-ins. In this example, Panorama 6 was recently installed.

Click OK to close the manager. Then, open a sound file to edit. In the Effects Rack you can click on the triangle at right to open a popup menu where you can select the effect. In this example the effects are organized by category and then manufacturer, hence Panorama 6 is found under VST3->Spatial->Wave Arts.