Star filter in the light category

Is it just me, or does the star filter within the light category not work at all? I cannot get it to do anything or give any effect. Could someone try it out and let me know if you can get it to work? Thanks!

It is working fine for me. The star filter is most noticeable when applied to an image with whites/hotspots.

Depending on image, the results can be subtle, so if you want similar effect that can be amplified, you might look at S_Glare or even S_Rays.