I'm not sure what's going on if it's not showing up after you export.
Make sure you're logged in as the same username as the one you're making the preset for when you export it.
Also, make sure when you edit the character you want it on, you go to the last page of character customization, and click on "Use Preset"
If it exported, the name of your preset should show up there.
And make sure that if you put your preset files into Feralheart > my_presets > preset_12, then you select preset 12 in the preset maker. Know what I mean?
Also, in order for your friends to see it, you have to send them your preset's .fhp file. After you export the preset, go into the main Feralheart file > Presets. There should be a file there with youruser_#.fhp. For example, if I exported a preset from the 3rd preset file in my_presets, mine would be named Shadowtooth_3.fhp
I hope this helped, and I hope we all get to see your snazzy new preset soon!