One of the stickies in this forum explains why there is no sync button. Somehow this is a closed threat, so you can't comment.
The assumption by Garmin seems to be that syncing works automatically. As usual with Garmin software it does not do this reliably.
So please, either fix Express or re-introduce the sync button.
Express sync fails about 80% of the time. Or in other words, it works once a week and fails all other days of the week.
Please re-introduce the sync button, to be able to restart this piece of software.