The H90 Control section of the manual is here: https://cdn.eventideaudio.com/manuals/h90/1.12.5/content/h90-control/index.html

There is a note the explains how to convert the mode of your Programs or List here: https://cdn.eventideaudio.com/manuals/h90/1.12.5/content/edit-modes/routing.html

You do not want to create a backup of your H90. You want to export the individual Programs or export a Program list, change your routing, and then import those files.

See #4 here for exporting a Program: https://cdn.eventideaudio.com/manuals/h90/1.12.5/content/h90-control/edit.html

See #7-8 for exporting/importing a Program list.