Call Garmin Support. If you are in North America, then if the call center has long hold times the VRU will ask you if you want to leave a call back number and they will call you back in the order that your current call is in the queue. I've done that for the last 3 or 4 times I've called Garmin and usually I get a call back in less than 40 minutes.
If you didn't have special software tools that let you get into the hidden partition, then I think you are still good. Might just need to manually place an update file on it.
You have turned it off and on haven't you?