i suggest taking a look at the changelog.
While I understand and very often respect this type of responses, it is quite asinine in this case. I also understand and respect you might take the following negatively considering that at the end of the day, I'm the bozo asking for help.
The changelog leads up to v0.2.0 alpha ver 11, and from then to Steam Ver 1.8. While it is understood that Gothic/Kuro is the new demo? project? version?, it establishes basically nothing regarding why the OP has both 0.2.0 alpha 11, steam 1.8 (+patched, whatever that is?) as well as the unnamed top link under Download - not to mention how all the links lead to seemingly mismatched versions: Unnamed Download leads to Under The Witch 1.8; Steam 1.8 leads to HerosJourney, with only the 0.2.0 alpha 11 leading to actual 0.2.0 alpha 11.
There is no flow of continuity between versions, or even the reason(s) for all the versions being listed. It's not obvious, it's not intuitive, and the changelog doesn't help, thank you very much.
So I would rephrase - Could anyone please enlighten me regarding the differences between these versions? It is not immediately, entirely, or rather at all, obvious, as to why there are four download links for what is apparently a "finished" game + the new "chapter" of it.