Sorry to disappoint you, but my plugin doesn't change the frame rate of animations. That is what YEP_CoreEngine does. What Animation Move Rate does is change the frame rate of the movement (like moving a rock across the screen in one of the examples).
If you want to use the default 15 FPS animations at 30 FPS, what you can do is go to the animations database and copy and paste each frame so that each frame appears twice in the list. What that does is make the game show each frame twice, so that it looks like a 15 FPS animation at 30 FPS.