.NSX File Extension
What is an NSX file?
Project created and used by AppStudio, an IDE used to create desktop, Android, and iOS applications; stores project data, such as project language, properties, and functions.
You can drag-and-drop a variety of functions from the toolbox provided with the application. You can add images, lines, NavBars, buttons, FooterBars, TextBoxes, sliders, and more.
NOTE: You can create an NSX file by selecting File → New Project and then select Save Project As.... You can open an NSX file by selecting File → Open Project....