luckily I ran a library backup a few days ago [gee was I relieved when I realised that], so only my most recent work was lost.
After much frustration trying to get my wifi set up again (for some reason it didnt want to accept the login details or save them), I finally re downloaded dingo, deleted the golden update file from the sd card, and ran the update.
I did give tech support a shout by writing a follow up in my previous ticket.