I am trying to roll back nuvi 57 firmware and am unable to do so by following advice found here and elsewhere. Garmin is intentionally downgrading this product with firmware updates. Latest version renders the unit unable to interact with Basecamp and hides waypoints. I have downloaded an earlier version, and copied to the Garmin folder -- no joy. I have also created a System folder, and copied to there -- no joy. Any other ideas, or will I just have to throw this piece of junk in the garbage?