When Windows 10 launched in 2015, CS6 was already three years old and technically out of its official support window. This created a "luck of the draw" situation for users:
Flash CS6 is heavily optimized for ActionScript 3.0, offering a robust environment for coding interactive content. adobe flash professional cs6 download for windows 10
Navigate to Compatibility and click Change high DPI settings. When Windows 10 launched in 2015, CS6 was