Hi, I am looking for a visual novel that was on here but when I went back to redownload it it gave me a 404 error page. I believe one of them was called Detective Gusset: Mall Mystery.

https://www.deviantart.com/betweentwocheeks/art/DETECTIVE-GUSSET-MALL-MYSTERY-Fu...

This seems to be the artist's page on DeviantArt. Judging by the comments, it looks abandoned. They have a Patreon, so you might be able to reach out there. It's possible they decided to make it exclusive and haven't announced it for whatever reason.