Help needed. 2020.10 Map updates keep failing to install on my Fenix 5 Plus

I've tried on several occasions to update the maps on my Fenix 5 Plus to the new 2020.10 version but everytime I try it fails. The furthest I've seen the progress bar reach is about 28% which was earlier today. Its about a 7Gb update so I know it will take a while, but I don't have any options to install just 1 of the 3 updates to see if that would help. I've got the latest version of Garmin Express installed (v7.0.1.0) and version 12.00 software installed on my watch.

Any ideas of what I can do to install the map updates?