upgrade for pandigital nova

I downloaded what I believe is the new upgrade to 2.2 the name of it
is (pandigital root.zip) if this is not the right one please advise.
I have tried to log on to the pandigital site but haven't been successful in doing so, I have read that pandigital is out of business and has filed for bankruptcy.
If this is true then where do you go for the update and is this way you can not connect to there site.
I have been using my home computer to do this.