Underneath its simple front interface is a powerhouse of tools.
And in astrophotography, that tends to be a good thing!
The two aspects - color and luminance - of your image are neatly separated thanks to StarTools' signal evolution Tracking engine.
Whatever detail lies outside the RoI, is simply forced to conform to the stretch that was designed for the RoI.
You can convert everything you see to a format you find convenient. Give it a try!