For the past weeks, Garmin express has had an update for 5.8GB update for the maps and POIs, but each time I've tried to install it, it gets to the 'preparing' stage, then a red error bar appears saying there was an error while installing. Any ideas on how to get it working? I have tried closing garmin, restarting the computer, and even deleting the app and reinstalling. I use a mac if it makes any difference.