Hmm...That seems a little bit shady to me. When you buy a preset, the seller is supposed to give you the whole preset file. Not just the .fhp file. The .fhp file is usually given only when you want to see presets from other people. I always give the entire preset file to whoever bought or won the preset. That person who you bought the preset from might be scamming you! It seems weird that they didn't send you the entire preset file, which is what youre apparently supposed to do. I've been doing it like that forever. I wouldn't suggest buying any more presets from that person. Also what @Sigyrn said!
They give you a .fhp that's exported under your user so you can use it, It's supposed to prevent theft and copying, I suppose people have actually stolen and copied stuff that didn't belong to them since y'know if you have all the files in the wrong hands they can claim it's theirs and 'prove' by showing the files but idk. It's worked before with one person, everyone else is having issues with it not showing up on the presets in the character creator.
It only lets people see if it's a .fhp under your own username. I exported the preset under a friend's username so they can use this preset but two people said they couldn't see it. (Both friends). .fhp exports under your user because YOUR user is in the username slot, so I removed my user and inserted theirs so that it's supposed to show up in the presets when you edit a character and put on a preset. It's not ME having the problem, the preset I purchased works just fine it's just sharing presets for others without giving the entire files.
The preset I purchased off DA is exported under my username I added a _ between my user and the preset # and it worked, but it's just giving others a preset I Created. So, the seller didn't scam me at all I asked them about it and they said I did everything correctly and it should've worked and they suggested asking about it or you tubing it.(Youtube had nothing to help me out here.)