I am a proud owner of a original kobo. (2010) yesterday went to kobo site and downloaded a update which wipe my kobo clean I am unable to use it.

I am looking for help. It's old I Know but was simple and easy to use even with a button to turn pages.
Is there any way to fix it. Get the old Firmware. Or Do I Give up and Buy a new one. ?
If you think I should get a new Kobo. Which Model - Kobo Aura H20 ?
Have a Lager Collection of Books. Would like to have a reader that will allow me to import the collection and not harass me to go to the STORE AND BUY.