Home Sense Hub fails firmware update

My just-bought (because I couldn’t find the one that was pre-ordered ages ago) hub has been mostly set up with some sensors and the like, and after setting up the mode features, it told me there was a firmware update that I needed to run ( to

This update has failed repeatedly (at least 5 times) since yesterday afternoon. There doesn’t appear to be any manual way to install an update, so I was wondering how to actually make my Hub update so it will… You know… Work.