Tacx Training App on Mac Won't Do Training Plans

Tacx Training App on my Mac Won't Do Training Plans. I can get to the section to chose Groundwork, Brickwork, or Roofing but then it kicks out to the web-based cloud.tacx webpage that then lets you select the Intensity and Week. The instructions say  "Start a workout to select this training plan." But since I am in the desktop web browser all I can do is "Follow" the activity. If I click on the actual activity (e.g. FTP test) it takes me to start screen for the activity but I cannot actually do it. And nothing links back to the actual TACX Mac App. 

It is as if this feature is totally not available for Mac users. What gives? I pay for a PREMIUM subscription.