You can load your saved ProAnimator scene inside of the After Effects PA Plug-in. Here's how.
1. Load After Effects and apply the ProAnimator effect to a 2D layer. Create a new scene.
2. Find the Effect Controls and click on the "Click to Edit ProAnimator" button to open the PA Set-up window.
3. Using the File menu, select File >Open to open your saved ProAnimator project.
Likewise, you can use File >Save to save a PA project inside of After Effects to be opened in the standalone PA app later.