I know air application has .air application, but after
installing the air application its extension is no longer ".air"
for windows its extension become ".exe" for mac and linux it is
some thing else.
secondly global Object Application has limited functionality
it doesn't provide the path of directory where application is
installed and complete name of application with extension, someone
can change the executable file name manually in installed
directory, in that case Application.application.name + ".exe"