Feral Heart

Hello. I'm new to making presets and recently made my own for this WarriorCats RolePlay I'm in.
But people are having difficulties downloading my preset. They download the file I upload to Mediafire and they put it into the preset folder and come back to  not seeing my preset.
My friends can't seem to find out the reason why, they said my files should be .png but it doesn't work when I put it to .png so I have all the files to .jpg, I'm not sure if this means anything at all?
I'm not sure if I'm doing it right or not...

What I do is I do all my files in Gimp, save all in my preset folder 7, all as .jpg apart from the mane, that is the only working .png. - So I save them then load up Feralheart and go to preset maker, open preset 7, export it to my account then retrieve the file I exported from my preset folder. Take that file onto Mediafire to upload, copy my download link, send it to my friend, they download it, put it into their preset folder, restart their game and come back to see my character hasn't changed at all.

Am I missing something? All I really have is old youtube videos for help, which havn't proved most helpful right now, unless I'm not looking right.


All help is appreciated, thank you!