Hey, so i downloaded the file and i tried to do what you said to another person in a different comment but it's not really working. When i downloaded it i think it was already in the 'game file' and when i double click on it it asks if i want to open it as a word document or something.. so i'm very confused and would appreciate it if you could help, im on pc btw :)
Viewing post in Dawn Chorus NSFW patch comments
The nsfw_archive.rpa file comes inside a directory titled 'game' to show you an example of the file hierarchy (how it looks when installed correctly). You need to go to where you installed the actual game, not the patch, and find the 'game' directory there. Move the nsfw_archive.rpa file into that directory. You will know you have the correct directory because it will have archive.rpa (the non-nsfw one) inside it.