I wouldn't put this in general discussion if the game series had it's own forum, but here we are. I can't vouch for Neko Waifus 1-4 at this time, but other games in the series are uncensored except this one.

Anyway, you can get the patch for the game from here. Extract the subfolder and place in game's installation folder.

Hopefully GOG will fix the lack of forum and patch issues.

I can confirrm the censoring. In fact the censored version is missing additional puzzles with more nudity.

Now I will check all of those games to see if they are complete ...

However, I feel like the Neko Waifus 3 Sarah DLC is missing. I can't finish 100% and can't unlock the missing character.

Let me check this.

I only have 4 girls in Waifu 3 and don't know anything about a Sarah DLC. Maybe it is only available on Steam?
Just like I thought. Sarah is a purcheable DLC on Steam which is not available on GOG.
https://store.steampowered.com/app/1448980/Mosaique_Neko_Waifus_3_Sara/

I checked them all and all the orther games have the files need to get uncensored in them already. So this was probably just an oversight. Thank you for telling us.

Thank you for looking into the rest of the games.