Thank you for the answer. Yes I was still lost. But my question is mostly about
HH v0.17+ > v0.18.1 PC Patch (REQUIRES v0.17+)
I didnt understand if I should download this first or nah. But I think I got it now, thanks to your explanation
To give an explanation anyways: that is an update patch file (as stated in the name). It allows you to download only the updated content and apply it to your already downloaded game, that way you won't have to download the entire game again. It'll have instructions within the downloaded files on how to apply it, too!