It's probably increasing the exposure time and overriding the FPS setting to provide better images at a way low FPS, which will be choppy and blurry with motion. Lare's settings should take care of that.
The important ones:
Maximum exposure time, which will give you 15 fps minimum frame rate (this may cause some motion blur; 33 ms will reduce that but will reduce image quality as well, so it's a trade-off)
Slow shutter, which overrides maximum exposure time if enabled, I believe.