Notes about the SUA file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The SUA file type is primarily associated with 'SeeYou' by Naviter. SeeYou is a planning and analysis tool for glider pilots. It is designed for the desktop and notebook PCs. Note: The term SUA means Special Use Airspace and define various map areas. While these are often used for soaring, it's not a necessary only use. See the FAA site for more details.