(1) If I purchase one Pro Edition license, can I (only me) install and develop with FlyGrid on my workstation, laptop and tablet pc ?
FlyGrid Pro license is per developer seat license - yes you can install FlyGrid.net on your development machines as single developer.
(2) If I purchase one Pro Edition license, I am only entitled to receive updates for 60 days and then the product becomes, essentially, a dead end ?!
Please explain.
Yes - receiving of updates for the 60 days after purchase for the single developer FlyGrid.Net Pro/Std/Light licenses, but if you find bug or have a problem - in this case we'll provide you with fixed version.