Frank,
Thanks for your feedback on this. The new iFly 720 auto selects all out of date files via the wi-fi updates. We have it on our development list to revise the update process and add additional update options for iFly 700 users alike. The thinking is that you would remove and insert the iFly's SD card into your computer and by using a new Updater, you could have all files updated, set a preference or region, WX / TFR only and even possibly update along a route.
These are some initial ideas we are working through. None have formally been committed to, but they are an internal priority for our existing and future owners. Stay tuned...