It always pays to take a USB stick to a dealers. If their software isn't up to date, most things upgrade from a stick, nowadays, would have taken you 5-10 minutes to upgrade the store keyboard and then connect to the apps. I think, with how barebones brick and mortar music stores have to be to compete with online sources, that yes, it IS too much to expect all their gear to be upgraded..! YOU probably know ten times as much about the arrangers than any in store personnel!