A very popular, comprehensive tutorial titled "Processing a (noisy) DSLR image stack with StarTools" by Astro Blog Delta.
As of 1.7, enhanced mouse controls are implemented; Zoom in.
The Color module is very powerful - offering capabilities surpassing most other software - yet it is simple to use.
Most modules come with presets that quickly dial in useful parameter settings.
You can convert everything you see to a format you find convenient. Give it a try!