Sorry, I’m not sure what you could have done to lose your presets besides a factory reset.
Please see #1 on the list here for details about backing up a device: https://cdn.eventideaudio.com/manuals/h90/1.9.7/content/h90-control/edit.html#parameters-edit-menu
The list below explains how to export/import programs to or from your computer or iPad: https://cdn.eventideaudio.com/manuals/h90/1.9.7/content/h90-control/edit.html#the-playlist
