This mod is part of HardcoreSK Project. It parse launcher config and show HardcoreSK build version in season string, for example "Winter (abcd123)". The "abcd123" string is first 7 symbols of installed version hash.
It gives build version to HardcoreSK Project Team when someone sent a screenshot as a bug report.
The ShowHSKVersion.dll file should be plased to RimWorld\Mods\Core_SK\Assemblies\ directory.
The mod adds "Show HSK Version" entry in mods settings menu. You can click checkbox to turn off build version showing.