Enjoy your final image!
If you find that, despite your best efforts, you cannot get a significantly better result in StarTools than in any (yes any!) other software, please contact us.
Chances are that the image looks terrible, which is - believe it or not - the point.
The two aspects - colour and luminance - of your image are neatly separated thanks to StarTools' signal evolution Tracking engine.
The Color module is very powerful - offering capabilities surpassing most other software - yet it is simple to use.
Edges > Threshold; selects all pixels that are likely to belong to the edge of a feature.
You can convert everything you see to a format you find convenient. Give it a try!