Every time I connect my Edge Touring and start Garmin Express, it tells me there is a timezone update available. I install the update and it tells me that all updates were successfully completed, and tells me that the device software is up to date, but if I close Garmin Express and start it again, it again shows me that a timezone update is ready to install. Same problem if I don't close Garmin Express but unmount and disconnect the Edge Touring and then connect it again - timezone update again offered for installation.
The Edge Touring is running current 2.70 software, and Garmin Express is v3.2.25, also current as of an update check a few minutes ago. OS is Windows 8.1 64-bit.