im not sure if this is the correct place but the only 4.0.1 i could find on curse was the unstable one, unlike on aternos where there is a stable one.

I don't know how Aternos displays files, but this file is the latest version that has been officially released by us on CurseForge. I assume Aternos just fetches the files that are available on CurseForge, so there is probably a discrepancy regarding Aternos displaying files, so you should talk to them about this.