Nope, this is a limitation of the game engine. If your PC cannot render the game consistently at 58.8 Hz then you should not use this plugin.
For the purposes of playing animations, the engine assumes the frame rate is exactly one of 58.8 Hz, 29.4 Hz, 19.6 Hz, 14.7 Hz, etc. and advances the animation in exact multiples of 17 ms per frame, regardless of the actual time required to render the previous frame. This means that animations will slowly decrease to half speed as the frame rate drops from 58.8 to 29.4 Hz, then jump back up to full speed. After this things become less noticeable; between 29.4 and 19.6 Hz the speed will only drop to two thirds. The next range will only drop to three fourths and so on. As the frame rate drops the amount of slow-down decreases and the gaps between target rates get smaller, which helps to hide this artifact.
Sorry what then, is the requirement of ur PC to run it? Im using i7-4700MQ with Nvidia 780M. I am still experiencing slow and lags.