SkookumLogger has a builtin Help Book that is the most current documentation. GØDVJ has authored a SkookumLogger Guide. Additional information is linked on the Hints page.
There is no email reflector, blog, whatever, for SkookumLogger. Please contact K1GQ directly if you have a question or a problem. If you are in UK and have a concern relating to RSGB or UKEICC contesting, contact Jonathan, GØDVJ.
Note that I cannot support versions of SkookumLogger other than the version available on the Mac App Store.