It depends on the plugin. I'm not familiar with this one.
But if it has menu items, you can invoke the menu with app.menus.item("Menuname").menuItems.item("Itemname").associatedMenuActions.invoke();
It does have something in the menu, but it doesn't look completely right.
There is in Window: Extensions: Scene7. But it does not seem to be exactly the same thing, just related. It didn't seem to work.
Here is what I tried:
Thank you for your help.