Looks a little less noisy
Looks like there are still dark rings around the stars?
If you havn`t done any unsharp masking just some contrast, there must be something going on with the stacking? Is there any deconvolution happening with the stacking as this could do this if its set to harshly? This would also bring out the noise more as well.
I don`t have image plus so I can only guess what might be happening. Maybe someone with this software might know the best settings?
cheers Gary