Switch Tracking off and apply noise reduction. You will now see what all the "signal evolution Tracking" fuss is about, as StarTools seems to know exactly where the noise exists in your image, snuffing it out. The most important parameters to tweak are Smoothness, in combination with Grain Dispersion.
The Bin module puts you in control over the trade-off between resolution, resolved detail and noise.
The De-Noise module offers detail-aware, astro-specific noise reduction, which, paired with StarTools' Tracking feature, yields results that have no equal.
This way, nasty noise surprises when viewing the image at 100% are avoided.
To establish this baseline, increase the 'Grain size' parameter until no noise grain of any size can be seen any longer.
You can convert everything you see to a format you find convenient. Give it a try!