Ok so you're using MG driver 4.2.0 here, which has parameters that can be easily tweaked using PSFoCycle. Launch PSFoCycle -> Add.. -> open your .psflib files (with file type set to all so you can select them).
Parameters -> Playback Amount -> Modify... -> Set to 1 -> Ok -> Ok.
Adjust your length tags a bit where needed and you're done. :)