Tristy, the uncensored version is no longer sold, unfortunately. However, I'm using this patch on Steam that a user made, and it seems to work perfectly - https://steamcommunity.com/sharedfiles/filedetails/?id=697262043.
I only tested it a little bit, so I haven't gotten to the extra nightmare scene that's in that version, but the opening logo belongs to the uncensored version, so I'm pretty confident that it's correct.
It's a bit complicated to set up, and it's been a while since I've done it. The subtitles aren't important to me, so I only included the first patch, but if you want them, you will have to use both. If downloading the files feels too complicated (which I would understand, as I had to jump through some hoops), I can at least send you the patch I downloaded if you want. It's just the part without the subtitles, so you wouldn't get subtitles for Phoenix's internal thoughts. Everything else should be subtitled from what I remember, but I never use them, and it's been a while since I tested it. You'd have to read the instructions carefully for setting up the patch files, but I don't think that part is too difficult. Let me know if you're interested.
Draclvr, I loved Oxenfree also.
Really great game, and you get some slight changes if you play it a second time.
That's great that you got it for free!