unfortunately instructions do not exist to cover every possible situation.

but in general, to migrate elog to a new machine, I would say do this:
- on new machine, install new elog from scratch
- copy the old elogs from "logbooks" on the backup disk to the new elog "logbooks"
- merge the config file by hand (this may require a few tries)

feel free to ask for more help with any of these steps here.
K.O.