there is a zip package going around in private circles,or maybe not so private, to perform a manual update up to the latest firmware, contact a very well known dealer in this forum and he'll help you.
These past 3 months I replaced all of my 600 series receivers and bought them either on Ebay or Amazon,no problem to activate them ,except for the lack of updates on one of them, which was solved by a zip file sent by a close friend of mine.